[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"blog-post-nl-preflex-vs-vrije-bedrading":3,"blog-alternates-blog-post-nl-preflex-vs-vrije-bedrading-preflex-vs-open-wiring":357,"blog-next-steps-blog-post-nl-preflex-vs-vrije-bedrading-preflex-vs-open-wiring":1530},{"id":4,"title":5,"articleId":6,"body":7,"category":332,"date":333,"description":334,"extension":335,"image":24,"lastUpdated":336,"locale":337,"meta":338,"navigation":339,"ogImage":340,"path":341,"publishDate":333,"readTime":342,"refreshInterval":343,"seo":344,"seoTitle":345,"slug":346,"stem":347,"tags":348,"__hash__":356},"blog\u002Fblog\u002Fpreflex-vs-open-wiring.nl.md","Preflex vs. vrije bedrading: welke kabelmethode voor jouw project?","preflex-vs-open-wiring",{"type":8,"value":9,"toc":321},"minimark",[10,18,25,30,33,36,40,129,133,136,176,179,183,186,190,193,213,216,220,252,266,270,296,310],[11,12,13,17],"p",{},[14,15,16],"strong",{},"In nieuwbouw is Preflex met VOB-draad de Belgische standaard: de buizen liggen tijdens de ruwbouw op de vloerplaat of in de muur, en de draden blijven later vervangbaar. Bij renovatie is XVB-kabel zonder buis meestal de snellere oplossing, in een sleuf, in opbouw of in een holle ruimte."," Het AREI laat beide methodes toe; het regelt hoe je ze uitvoert.",[11,19,20],{},[21,22],"img",{"alt":23,"src":24},"Een elektricien legt installatiebuizen in een ruwbouw.","\u002Fimages\u002Fblog\u002Feditorial-2026-10-13\u002Fplanelec-preflex-vs-open-wiring-editorial.webp",[26,27,29],"h2",{"id":28},"wat-is-preflex","Wat is Preflex?",[11,31,32],{},"Preflex is in België de gangbare naam voor flexibele, geribde elektrische installatiebuizen in kunststof. Ze bestaan leeg of met in de fabriek ingetrokken VOB-draden. In nieuwbouw worden ze tijdens de ruwbouwfase op de betonplaat, in de dekvloer of in muursleuven gelegd en daarna ingegoten of bepleisterd.",[11,34,35],{},"Met vrije bedrading bedoelen we hier kabels zonder buis, meestal XVB: rechtstreeks in een sleuf onder pleister, in opbouw, op een kabelgoot of in holle constructieruimten.",[26,37,39],{"id":38},"preflex-en-vrije-bedrading-vergeleken","Preflex en vrije bedrading vergeleken",[41,42,43,59],"table",{},[44,45,46],"thead",{},[47,48,49,53,56],"tr",{},[50,51,52],"th",{},"Criterium",[50,54,55],{},"Preflex met VOB-draad",[50,57,58],{},"Vrije bedrading met XVB",[60,61,62,74,85,96,107,118],"tbody",{},[47,63,64,68,71],{},[65,66,67],"td",{},"Type geleider",[65,69,70],{},"Draad (H07V-U\u002F-R) in buis",[65,72,73],{},"Mantelkabel",[47,75,76,79,82],{},[65,77,78],{},"Typisch gebruik",[65,80,81],{},"Nieuwbouw, totaalrenovatie",[65,83,84],{},"Renovatie, kelder, technische ruimte, uitbreiding",[47,86,87,90,93],{},[65,88,89],{},"Draden later vervangen",[65,91,92],{},"ja, draden moeten altijd intrekbaar blijven (5.2.9.3)",[65,94,95],{},"alleen door open te breken of een nieuwe route",[47,97,98,101,104],{},[65,99,100],{},"In opbouw toegelaten",[65,102,103],{},"alleen de buis, niet de losse draad (5.2.9.5)",[65,105,106],{},"ja (5.2.9.5)",[47,108,109,112,115],{},[65,110,111],{},"Rechtstreeks in een sleuf",[65,113,114],{},"niet van toepassing",[65,116,117],{},"ja, binnen de installatiezones (5.2.9.10)",[47,119,120,123,126],{},[65,121,122],{},"Materiaal",[65,124,125],{},"buis plus elke draad afzonderlijk",[65,127,128],{},"één kabel met alle aders",[26,130,132],{"id":131},"wat-het-arei-voorschrijft-voor-buizen","Wat het AREI voorschrijft voor buizen",[11,134,135],{},"Onderafdeling 5.2.9.3 regelt de plaatsing in elektrische installatiebuizen:",[137,138,139,146,152,158,164,170],"ul",{},[140,141,142,145],"li",{},[14,143,144],{},"Diameter:"," buis en toebehoren zo kiezen dat de geleiders na plaatsing gemakkelijk in te trekken en te verwijderen zijn (letter d).",[140,147,148,151],{},[14,149,150],{},"Buigstraal:"," bij flexibele kunststofbuizen minstens acht keer de buitendiameter (letter e).",[140,153,154,157],{},[14,155,156],{},"Geen verbindingen in de buis:"," aansluitingen horen in trek- en verbindingsdozen op een geschikt klemmenblok (letter f).",[140,159,160,163],{},[14,161,162],{},"Brandbare buizen:"," alleen toegelaten als ze minstens 3 cm diep in onbrandbare materialen zijn ingewerkt (letter f).",[140,165,166,169],{},[14,167,168],{},"Warmte:"," geen kunststofbuizen waar de temperatuur bij normaal bedrijf 60 °C kan overschrijden (letter f).",[140,171,172,175],{},[14,173,174],{},"In ingewerkte buizen:"," geen T-stukken en bochtstukken; geleiders blijven in de dozen toegankelijk (letter i.2).",[11,177,178],{},"Een vaste vullingsgraad in procent staat niet in het AREI. De maatstaf is dat je de geleiders altijd kunt intrekken en verwijderen.",[26,180,182],{"id":181},"wat-het-arei-voorschrijft-voor-vrije-bedrading","Wat het AREI voorschrijft voor vrije bedrading",[11,184,185],{},"Leidingen die zonder buis worden ingewerkt, moeten kabels zijn; geleiders met alleen basisisolatie zijn daarvoor verboden (5.2.9.10). In muren van lokalen gelden installatiezones: horizontale tracés 25 tot 35 cm onder het plafond of boven de vloer, verticale tracés zo dicht mogelijk bij een hoek of 10 tot 20 cm naast deuromlijstingen, en minstens 0,4 cm pleister erover. In beton of cement heb je minstens 3 cm dekking nodig.",[26,187,189],{"id":188},"welke-brandklasse-heb-je-nodig","Welke brandklasse heb je nodig?",[11,191,192],{},"Bepalend is de CPR-klasse van de kabel, niet die van de buis:",[137,194,195,201,207],{},[140,196,197,200],{},[14,198,199],{},"Afzonderlijk geplaatst:"," minstens F1 of klasse Eca (5.2.7.2).",[140,202,203,206],{},[14,204,205],{},"In bundels of in vlakke schikking:"," minstens F2 of klasse Cca (5.2.7.3).",[140,208,209,212],{},[14,210,211],{},"In holle constructieruimten:"," eveneens F2 of Cca (4.3.3.5 b en 5.2.9.9). Een houtskelet- of gipskartonwand is een holle constructieruimte.",[11,214,215],{},"Uitgezonderd zijn kabels en buizen die minstens 3 cm diep in een onbrandbare bekleding zijn ingewerkt (5.2.7.1 nr. 3). Ligt de Preflex-buis minstens 3 cm diep in beton of chape, dan geldt die uitzondering. In een holle ruimte telt daarentegen de klasse van kabel en buis (5.2.9.9 met 5.2.7.3 en 5.2.7.4).",[26,217,219],{"id":218},"wanneer-welke-methode","Wanneer welke methode?",[137,221,222,228,234,240,246],{},[140,223,224,227],{},[14,225,226],{},"Nieuwbouw:"," Preflex met VOB-draad, ingegoten of ingepleisterd in vloer en muur.",[140,229,230,233],{},[14,231,232],{},"Renovatie met sleuven:"," XVB rechtstreeks in de sleuf, binnen de installatiezones.",[140,235,236,239],{},[14,237,238],{},"Kelder, garage, technische ruimte:"," XVB in opbouw of op een kabelgoot.",[140,241,242,245],{},[14,243,244],{},"Houtbouw, droogbouw, verlaagd plafond:"," kabel met minstens Cca of een geschikt buizensysteem.",[140,247,248,251],{},[14,249,250],{},"Gedeeltelijke renovatie:"," beide combineren; nieuwe kringen in Preflex, bestaande leidingen na controle behouden.",[11,253,254,255,260,261,265],{},"Meer over de kabeltypes in ",[256,257,259],"a",{"href":258},"\u002Fblog\u002Fxvb-vs-vob-kabel","XVB of VOB",", de volledige systematiek in ",[256,262,264],{"href":263},"\u002Fblog\u002Fplaatsingswijzen-arei-eendraadschema","Plaatsingswijzen volgens het AREI",".",[26,267,269],{"id":268},"gerelateerde-artikelen","Gerelateerde artikelen",[137,271,272,278,284,290],{},[140,273,274],{},[256,275,277],{"href":276},"\u002Fblog\u002Farei-2026-wijzigingen","Wat verandert er met het AREI 2026?",[140,279,280],{},[256,281,283],{"href":282},"\u002Fblog\u002Fbadkamer-kabels-arei-zones","Badkamer-elektriciteit: zones en kabeltypes",[140,285,286],{},[256,287,289],{"href":288},"\u002Fblog\u002Foud-arei-part-8","Oudere installaties en AREI Deel 8",[140,291,292],{},[256,293,295],{"href":294},"\u002Fblog\u002Frenovatie-arei-elektrische-plannen","Renovatie en AREI: wanneer heb je nieuwe elektrische plannen nodig?",[11,297,298],{},[299,300,301,302,305,306],"em",{},"Plan je elektrische installatie met ",[14,303,304],{},"PlanElec",", of het nu nieuwbouw met Preflex is of renovatie met vrije bedrading: plaatsingswijze en kabeltype leg je per kabel vast, eendraadschema en situatieplan exporteer je als pdf. De zelfcontrole meldt kabels in holle wanden onder Cca zonder gedocumenteerde buis. ",[256,307,309],{"href":308},"\u002F","Nu gratis starten →",[11,311,312],{},[299,313,314,315,265],{},"Regelgrondslag: AREI Boek 1, versie 06, onderafdelingen 4.3.3.5, 5.2.7.1–5.2.7.3, 5.2.9.3, 5.2.9.5, 5.2.9.9 en 5.2.9.10. Officiële tekst: ",[256,316,320],{"href":317,"rel":318},"https:\u002F\u002Feconomie.fgov.be\u002Fnl\u002Fpublicaties\u002Falgemeen-reglement-op-de",[319],"nofollow","FOD Economie",{"title":322,"searchDepth":323,"depth":323,"links":324},"",2,[325,326,327,328,329,330,331],{"id":28,"depth":323,"text":29},{"id":38,"depth":323,"text":39},{"id":131,"depth":323,"text":132},{"id":181,"depth":323,"text":182},{"id":188,"depth":323,"text":189},{"id":218,"depth":323,"text":219},{"id":268,"depth":323,"text":269},"faq","2026-03-27","Preflex-buis of XVB rechtstreeks geplaatst? Vergelijking voor nieuwbouw en renovatie in België met de AREI-regels voor buizen, brandklassen en installatiezones.","md","2026-10-05","nl",{},true,"\u002Fimages\u002Fblog\u002Feditorial-2026-10-13\u002Fshare\u002Fplanelec-preflex-vs-open-wiring-editorial.jpg","\u002Fblog\u002Fpreflex-vs-open-wiring.nl","4 min",12,{"title":5,"description":334},"Preflex of vrije bedrading: welke kabelmethode?","preflex-vs-vrije-bedrading","blog\u002Fpreflex-vs-open-wiring.nl",[349,350,351,352,353,354,355],"preflex","bedrading","nieuwbouw","renovatie","AREI","brandveiligheid","XVB","mtb82D1wt4fncIuvTqHYie8bEJDD81z-HkpE0l4sXPE",[358,677,995,1316],{"id":359,"title":360,"articleId":6,"body":361,"category":332,"date":333,"description":663,"extension":335,"image":24,"lastUpdated":336,"locale":664,"meta":665,"navigation":339,"ogImage":340,"path":666,"publishDate":333,"readTime":342,"refreshInterval":343,"seo":667,"seoTitle":668,"slug":669,"stem":670,"tags":671,"__hash__":676},"blog\u002Fblog\u002Fpreflex-vs-open-wiring.de.md","Preflex vs. freie Verlegung: Welche Kabelmethode für dein Projekt?",{"type":8,"value":362,"toc":654},[363,369,374,378,381,384,388,469,473,476,514,517,521,524,528,531,551,554,558,590,602,606,632,644],[11,364,365,368],{},[14,366,367],{},"Im Neubau ist Preflex mit VOB-Adern der belgische Standard: Die Rohre liegen im Rohbau auf der Decke oder in der Wand, und Leiter bleiben später austauschbar. In der Renovierung ist XVB-Kabel ohne Rohr meist die schnellere Lösung, im Mauerschlitz, auf Putz oder im Hohlraum."," Das AREI erlaubt beide Methoden; es regelt, wie du sie ausführst.",[11,370,371],{},[21,372],{"alt":373,"src":24},"Elektrofachkraft verlegt Installationsrohre im Rohbau.",[26,375,377],{"id":376},"was-ist-preflex","Was ist Preflex?",[11,379,380],{},"Preflex ist in Belgien die gängige Bezeichnung für flexible, gewellte Elektroinstallationsrohre aus Kunststoff. Es gibt sie leer oder mit werkseitig eingezogenen VOB-Adern. Im Neubau werden sie in der Rohbauphase auf der Betondecke, im Estrich oder in Wandschlitzen verlegt und anschließend eingegossen oder verputzt.",[11,382,383],{},"Unter freier Verlegung versteht man hier Kabel ohne Rohr, typischerweise XVB: direkt im Schlitz unter Putz, auf Putz, auf der Kabelrinne oder in baulichen Hohlräumen.",[26,385,387],{"id":386},"preflex-und-freie-verlegung-im-vergleich","Preflex und freie Verlegung im Vergleich",[41,389,390,403],{},[44,391,392],{},[47,393,394,397,400],{},[50,395,396],{},"Kriterium",[50,398,399],{},"Preflex mit VOB-Adern",[50,401,402],{},"Freie Verlegung mit XVB",[60,404,405,415,426,437,447,458],{},[47,406,407,410,413],{},[65,408,409],{},"Leitertyp",[65,411,412],{},"Aderleitung (H07V-U\u002F-R) im Rohr",[65,414,73],{},[47,416,417,420,423],{},[65,418,419],{},"Typischer Einsatz",[65,421,422],{},"Neubau, Kernsanierung",[65,424,425],{},"Renovierung, Keller, Technikraum, Nachrüstung",[47,427,428,431,434],{},[65,429,430],{},"Leiter später tauschen",[65,432,433],{},"ja, Leiter müssen jederzeit einziehbar bleiben (5.2.9.3)",[65,435,436],{},"nur durch Aufstemmen oder neuen Weg",[47,438,439,442,445],{},[65,440,441],{},"Auf Putz zulässig",[65,443,444],{},"nur das Rohr, nicht die lose Ader (5.2.9.5)",[65,446,106],{},[47,448,449,452,455],{},[65,450,451],{},"Direkt im Schlitz ohne Rohr",[65,453,454],{},"entfällt",[65,456,457],{},"ja, in den Installationszonen (5.2.9.10)",[47,459,460,463,466],{},[65,461,462],{},"Material",[65,464,465],{},"Rohr plus jede Ader einzeln",[65,467,468],{},"ein Kabel mit allen Adern",[26,470,472],{"id":471},"was-das-arei-für-rohre-vorschreibt","Was das AREI für Rohre vorschreibt",[11,474,475],{},"Unterabschnitt 5.2.9.3 regelt die Verlegung in Elektroinstallationsrohren:",[137,477,478,484,490,496,502,508],{},[140,479,480,483],{},[14,481,482],{},"Durchmesser:"," Rohr und Zubehör so bemessen, dass sich Leiter nach der Verlegung leicht einziehen und entfernen lassen (Buchstabe d).",[140,485,486,489],{},[14,487,488],{},"Biegeradius:"," bei flexiblen Kunststoffrohren mindestens das Achtfache des Außendurchmessers (Buchstabe e).",[140,491,492,495],{},[14,493,494],{},"Keine Verbindungen im Rohr:"," Anschlüsse gehören in Zug- und Verbindungsdosen auf einen geeigneten Klemmenblock (Buchstabe f).",[140,497,498,501],{},[14,499,500],{},"Brennbare Rohre:"," nur zulässig, wenn sie mindestens 3 cm tief in nicht brennbare Materialien eingebaut sind (Buchstabe f).",[140,503,504,507],{},[14,505,506],{},"Wärme:"," Kunststoffrohre nicht dort, wo die Temperatur im Normalbetrieb 60 °C übersteigen kann (Buchstabe f).",[140,509,510,513],{},[14,511,512],{},"In eingebauten Rohren:"," keine T-Stücke und Winkel; Leiter bleiben in den Dosen zugänglich (Buchstabe i.2).",[11,515,516],{},"Eine feste Füllgrenze in Prozent nennt das AREI nicht. Maßstab ist, dass sich die Leiter jederzeit einziehen und entfernen lassen.",[26,518,520],{"id":519},"was-das-arei-für-freie-verlegung-vorschreibt","Was das AREI für freie Verlegung vorschreibt",[11,522,523],{},"Direkt eingebaute Leitungen ohne Rohr müssen ein Kabel sein; reine Aderleitungen mit Basisisolierung sind dafür verboten (5.2.9.10). In Wänden von Räumen gelten Installationszonen: waagerechte Führungen 25 bis 35 cm unter der Decke oder über dem Boden, senkrechte nahe an Raumecken oder 10 bis 20 cm neben Türzargen, mindestens 0,4 cm Putz darüber. In Beton oder Zement brauchst du mindestens 3 cm Überdeckung.",[26,525,527],{"id":526},"welche-brandklasse-brauchst-du","Welche Brandklasse brauchst du?",[11,529,530],{},"Entscheidend ist die CPR-Klasse des Kabels, nicht die des Rohrs:",[137,532,533,539,545],{},[140,534,535,538],{},[14,536,537],{},"Einzeln verlegt:"," mindestens F1 oder Klasse Eca (5.2.7.2).",[140,540,541,544],{},[14,542,543],{},"In Bündeln oder ebener Anordnung:"," mindestens F2 oder Klasse Cca (5.2.7.3).",[140,546,547,550],{},[14,548,549],{},"In baulichen Hohlräumen:"," ebenfalls F2 oder Cca (4.3.3.5 b und 5.2.9.9). Eine Holzständer- oder Trockenbauwand ist ein baulicher Hohlraum.",[11,552,553],{},"Ausgenommen sind Kabel und Rohre, die mindestens 3 cm tief in eine nicht brennbare Bekleidung eingebaut sind (5.2.7.1 Nr. 3). Liegt das Preflex-Rohr mindestens 3 cm tief in Beton oder Estrich, greift diese Ausnahme. Im Hohlraum zählt dagegen die Klasse von Kabel und Rohr (5.2.9.9 mit 5.2.7.3 und 5.2.7.4).",[26,555,557],{"id":556},"wann-welche-methode","Wann welche Methode?",[137,559,560,566,572,578,584],{},[140,561,562,565],{},[14,563,564],{},"Neubau:"," Preflex mit VOB-Adern, in Decke und Wand eingegossen oder eingeputzt.",[140,567,568,571],{},[14,569,570],{},"Renovierung mit Schlitzen:"," XVB direkt im Schlitz, in den Installationszonen.",[140,573,574,577],{},[14,575,576],{},"Keller, Garage, Technikraum:"," XVB auf Putz oder auf der Kabelrinne.",[140,579,580,583],{},[14,581,582],{},"Holzbau, Trockenbau, abgehängte Decke:"," Kabel mit mindestens Cca oder ein geeignetes Rohrsystem.",[140,585,586,589],{},[14,587,588],{},"Teilrenovierung:"," beides kombinieren; neue Kreise in Preflex, bestehende Leitungen nach Prüfung belassen.",[11,591,592,593,597,598,265],{},"Mehr zu den Kabeltypen im Vergleich ",[256,594,596],{"href":595},"\u002Fde\u002Fblog\u002Fxvb-vs-vob-kabel","XVB oder VOB",", die vollständige Systematik im Artikel ",[256,599,601],{"href":600},"\u002Fde\u002Fblog\u002Fverlegearten-arei-eindrahtschema","Verlegearten nach AREI",[26,603,605],{"id":604},"verwandte-artikel","Verwandte Artikel",[137,607,608,614,620,626],{},[140,609,610],{},[256,611,613],{"href":612},"\u002Fde\u002Fblog\u002Farei-2026-aenderungen","Was ändert sich mit dem AREI 2026?",[140,615,616],{},[256,617,619],{"href":618},"\u002Fde\u002Fblog\u002Fbadezimmer-kabel-arei-zonen","Badezimmer-Elektrik: Zonen und Kabeltypen",[140,621,622],{},[256,623,625],{"href":624},"\u002Fde\u002Fblog\u002Faltbau-arei-part-8","Altbau und AREI Teil 8",[140,627,628],{},[256,629,631],{"href":630},"\u002Fde\u002Fblog\u002Frenovierung-arei-elektroplaene","Renovierung und AREI: Wann brauchst du neue Elektropläne?",[11,633,634],{},[299,635,636,637,639,640],{},"Plane deine Elektroinstallation mit ",[14,638,304],{},", ob Neubau mit Preflex oder Renovierung mit freier Verlegung: Verlegeart und Kabeltyp hältst du je Kabel fest, Eindrahtschema und Positionsplan exportierst du als PDF. Die Selbstprüfung meldet Kabel in Hohlwänden unter Cca ohne dokumentiertes Leerrohr. ",[256,641,643],{"href":642},"\u002Fde","Jetzt kostenlos starten →",[11,645,646],{},[299,647,648,649,265],{},"Regelgrundlage: AREI Buch 1, Version 06, Unterabschnitte 4.3.3.5, 5.2.7.1–5.2.7.3, 5.2.9.3, 5.2.9.5, 5.2.9.9 und 5.2.9.10. Amtliche Fassung: ",[256,650,653],{"href":651,"rel":652},"https:\u002F\u002Feconomie.fgov.be\u002Fde\u002Fpublication\u002Fallgemeine-vorschriften-fuer",[319],"FÖD Wirtschaft",{"title":322,"searchDepth":323,"depth":323,"links":655},[656,657,658,659,660,661,662],{"id":376,"depth":323,"text":377},{"id":386,"depth":323,"text":387},{"id":471,"depth":323,"text":472},{"id":519,"depth":323,"text":520},{"id":526,"depth":323,"text":527},{"id":556,"depth":323,"text":557},{"id":604,"depth":323,"text":605},"Preflex-Rohr oder XVB direkt verlegt? Vergleich für Neubau und Renovierung in Belgien mit den AREI-Regeln zu Rohren, Brandklassen und Installationszonen.","de",{},"\u002Fblog\u002Fpreflex-vs-open-wiring.de",{"title":360,"description":663},"Preflex oder freie Verlegung: welche Kabelmethode?","preflex-vs-freie-verlegung","blog\u002Fpreflex-vs-open-wiring.de",[349,672,673,674,353,675,355],"kabelverlegung","neubau","renovierung","brandschutz","HtKstTUhGfFEa5TnxSKSPZp5A5jWwFAmjBt784mm0Mk",{"id":678,"title":679,"articleId":6,"body":680,"category":332,"date":333,"description":982,"extension":335,"image":24,"lastUpdated":336,"locale":983,"meta":984,"navigation":339,"ogImage":340,"path":985,"publishDate":333,"readTime":342,"refreshInterval":343,"seo":986,"seoTitle":987,"slug":6,"stem":988,"tags":989,"__hash__":994},"blog\u002Fblog\u002Fpreflex-vs-open-wiring.en.md","Preflex vs. Open Wiring: Which Cable Method for Your Project?",{"type":8,"value":681,"toc":973},[682,688,693,697,700,703,707,789,793,796,833,836,840,843,847,850,870,873,877,909,921,925,951,963],[11,683,684,687],{},[14,685,686],{},"In new builds, Preflex with VOB wires is the Belgian standard: the conduits go onto the slab or into the walls during the shell phase, and the wires stay replaceable later. In renovations, XVB cable without conduit is usually the faster option, in a wall chase, surface-mounted or in a cavity."," The AREI\u002FRGIE permits both methods; it governs how you carry them out.",[11,689,690],{},[21,691],{"alt":692,"src":24},"An electrician positions electrical conduits in an unfinished building.",[26,694,696],{"id":695},"what-is-preflex","What is Preflex?",[11,698,699],{},"In Belgium, Preflex is the common name for flexible corrugated plastic electrical conduit. It comes empty or with factory-pulled VOB wires. In new builds, it is laid during the shell phase on the concrete slab, in the screed or in wall chases, and then cast in or plastered over.",[11,701,702],{},"Open wiring here means cables without conduit, usually XVB: directly in a chase under plaster, surface-mounted, on a cable tray or in building cavities.",[26,704,706],{"id":705},"preflex-and-open-wiring-compared","Preflex and open wiring compared",[41,708,709,722],{},[44,710,711],{},[47,712,713,716,719],{},[50,714,715],{},"Criterion",[50,717,718],{},"Preflex with VOB wires",[50,720,721],{},"Open wiring with XVB",[60,723,724,735,746,757,768,779],{},[47,725,726,729,732],{},[65,727,728],{},"Conductor type",[65,730,731],{},"Single-core wire (H07V-U\u002F-R) in conduit",[65,733,734],{},"Sheathed cable",[47,736,737,740,743],{},[65,738,739],{},"Typical use",[65,741,742],{},"New build, major renovation",[65,744,745],{},"Renovation, basement, plant room, extension",[47,747,748,751,754],{},[65,749,750],{},"Replacing wires later",[65,752,753],{},"yes, wires must remain pullable at all times (5.2.9.3)",[65,755,756],{},"only by opening up or using a new route",[47,758,759,762,765],{},[65,760,761],{},"Surface mounting",[65,763,764],{},"only the conduit, not the bare wire (5.2.9.5)",[65,766,767],{},"yes (5.2.9.5)",[47,769,770,773,776],{},[65,771,772],{},"Directly in a chase",[65,774,775],{},"not applicable",[65,777,778],{},"yes, within the installation zones (5.2.9.10)",[47,780,781,783,786],{},[65,782,462],{},[65,784,785],{},"conduit plus each wire separately",[65,787,788],{},"one cable with all cores",[26,790,792],{"id":791},"what-the-arei-requires-for-conduits","What the AREI requires for conduits",[11,794,795],{},"Subsection 5.2.9.3 governs installation in electrical conduits:",[137,797,798,803,809,815,821,827],{},[140,799,800,802],{},[14,801,144],{}," conduits and fittings sized so that conductors can easily be pulled in and removed after installation (letter d).",[140,804,805,808],{},[14,806,807],{},"Bending radius:"," at least eight times the outside diameter for flexible thermoplastic conduit (letter e).",[140,810,811,814],{},[14,812,813],{},"No joints in the conduit:"," connections belong in pull or junction boxes on a suitable terminal block (letter f).",[140,816,817,820],{},[14,818,819],{},"Combustible conduit:"," permitted only if embedded at least 3 cm deep in non-combustible materials (letter f).",[140,822,823,826],{},[14,824,825],{},"Heat:"," no thermoplastic conduit where the temperature can exceed 60 °C in normal operation (letter f).",[140,828,829,832],{},[14,830,831],{},"Embedded conduit:"," no tees or elbows; conductors remain accessible in the boxes (letter i.2).",[11,834,835],{},"The AREI sets no fill limit as a percentage. The test is that conductors can be pulled in and removed at any time.",[26,837,839],{"id":838},"what-the-arei-requires-for-open-wiring","What the AREI requires for open wiring",[11,841,842],{},"Wiring embedded without conduit must be cable; conductors with basic insulation only are prohibited there (5.2.9.10). In the walls of rooms, installation zones apply: horizontal runs 25 to 35 cm below the ceiling or above the floor, vertical runs as close as possible to a corner or 10 to 20 cm beside door frames, and at least 0.4 cm of plaster cover. In concrete or cement, you need at least 3 cm of cover.",[26,844,846],{"id":845},"which-fire-class-do-you-need","Which fire class do you need?",[11,848,849],{},"What counts is the CPR class of the cable, not of the conduit:",[137,851,852,858,864],{},[140,853,854,857],{},[14,855,856],{},"Installed singly:"," at least F1 or class Eca (5.2.7.2).",[140,859,860,863],{},[14,861,862],{},"In bundles or flat formation:"," at least F2 or class Cca (5.2.7.3).",[140,865,866,869],{},[14,867,868],{},"In building cavities:"," also F2 or Cca (4.3.3.5 b and 5.2.9.9). A timber-frame or plasterboard stud wall is a building cavity.",[11,871,872],{},"Cables and conduits embedded at least 3 cm deep in non-combustible cladding are exempt (5.2.7.1 no. 3). If the Preflex conduit sits at least 3 cm deep in concrete or screed, this exemption applies. In a cavity, by contrast, the class of cable and conduit counts (5.2.9.9 with 5.2.7.3 and 5.2.7.4).",[26,874,876],{"id":875},"which-method-when","Which method when?",[137,878,879,885,891,897,903],{},[140,880,881,884],{},[14,882,883],{},"New build:"," Preflex with VOB wires, cast into or plastered into floors and walls.",[140,886,887,890],{},[14,888,889],{},"Renovation with chases:"," XVB directly in the chase, within the installation zones.",[140,892,893,896],{},[14,894,895],{},"Basement, garage, plant room:"," XVB surface-mounted or on a cable tray.",[140,898,899,902],{},[14,900,901],{},"Timber frame, drywall, suspended ceiling:"," cable rated at least Cca or a suitable conduit system.",[140,904,905,908],{},[14,906,907],{},"Partial renovation:"," combine both; new circuits in Preflex, existing wiring kept after inspection.",[11,910,911,912,916,917,265],{},"For the cable types, see ",[256,913,915],{"href":914},"\u002Fen\u002Fblog\u002Fxvb-vs-vob-cable","XVB cable or VOB wire","; for the complete system, ",[256,918,920],{"href":919},"\u002Fen\u002Fblog\u002Finstallation-methods-arei","Installation methods under AREI",[26,922,924],{"id":923},"related-articles","Related articles",[137,926,927,933,939,945],{},[140,928,929],{},[256,930,932],{"href":931},"\u002Fen\u002Fblog\u002Farei-2026-changes","What Changes with the AREI 2026?",[140,934,935],{},[256,936,938],{"href":937},"\u002Fen\u002Fblog\u002Fbathroom-cables-arei-zones","Bathroom Electrics: Zones and Cable Types",[140,940,941],{},[256,942,944],{"href":943},"\u002Fen\u002Fblog\u002Fold-building-arei-part-8","Old Buildings and AREI Part 8",[140,946,947],{},[256,948,950],{"href":949},"\u002Fen\u002Fblog\u002Frenovation-electrical-plans","Renovation and AREI: when do you need new electrical plans?",[11,952,953],{},[299,954,955,956,958,959],{},"Plan your electrical installation with ",[14,957,304],{},", whether it is a new build with Preflex or a renovation with open wiring: you record installation method and cable type per cable and export the single-line diagram and situation plan as PDF. The self-check flags cables in hollow walls below Cca without documented conduit. ",[256,960,962],{"href":961},"\u002Fen","Start for free →",[11,964,965],{},[299,966,967,968,265],{},"Regulatory basis: AREI\u002FRGIE Book 1, version 06, subsections 4.3.3.5, 5.2.7.1–5.2.7.3, 5.2.9.3, 5.2.9.5, 5.2.9.9 and 5.2.9.10. Official text: ",[256,969,972],{"href":970,"rel":971},"https:\u002F\u002Feconomie.fgov.be\u002Ffr\u002Fpublications\u002Freglement-general-sur-les",[319],"FPS Economy",{"title":322,"searchDepth":323,"depth":323,"links":974},[975,976,977,978,979,980,981],{"id":695,"depth":323,"text":696},{"id":705,"depth":323,"text":706},{"id":791,"depth":323,"text":792},{"id":838,"depth":323,"text":839},{"id":845,"depth":323,"text":846},{"id":875,"depth":323,"text":876},{"id":923,"depth":323,"text":924},"Preflex conduit or XVB installed directly? Comparison for new builds and renovations in Belgium, with the AREI\u002FRGIE rules on conduits, fire classes and installation zones.","en",{},"\u002Fblog\u002Fpreflex-vs-open-wiring.en",{"title":679,"description":982},"Preflex vs. Open Wiring: Which Cable Method?","blog\u002Fpreflex-vs-open-wiring.en",[349,990,991,992,353,993,355],"wiring","new build","renovation","fire safety","hEBvAD9lnFC_TY9_YPTZUep_K4YWzxienyVbTmWYoOY",{"id":996,"title":997,"articleId":6,"body":998,"category":332,"date":333,"description":1301,"extension":335,"image":24,"lastUpdated":336,"locale":1302,"meta":1303,"navigation":339,"ogImage":340,"path":1304,"publishDate":333,"readTime":342,"refreshInterval":343,"seo":1305,"seoTitle":1306,"slug":1307,"stem":1308,"tags":1309,"__hash__":1315},"blog\u002Fblog\u002Fpreflex-vs-open-wiring.fr.md","Preflex vs. pose libre : quelle méthode de câblage pour votre projet ?",{"type":8,"value":999,"toc":1292},[1000,1006,1011,1015,1018,1021,1025,1108,1112,1115,1153,1156,1160,1163,1167,1170,1190,1193,1197,1229,1241,1245,1271,1283],[11,1001,1002,1005],{},[14,1003,1004],{},"En construction neuve, le Preflex avec fils VOB est la norme en Belgique : les gaines sont posées au gros œuvre sur la dalle ou dans les murs, et les conducteurs restent remplaçables par la suite. En rénovation, le câble XVB sans conduit est généralement plus rapide, en saignée, en apparent ou dans un vide de construction."," Le RGIE admet les deux méthodes ; il fixe la manière de les mettre en œuvre.",[11,1007,1008],{},[21,1009],{"alt":1010,"src":24},"Un électricien pose des conduits électriques dans un bâtiment en construction.",[26,1012,1014],{"id":1013},"quest-ce-que-le-preflex","Qu’est-ce que le Preflex ?",[11,1016,1017],{},"En Belgique, « Preflex » désigne couramment les conduits électriques flexibles annelés en matière plastique. Ils existent vides ou avec des fils VOB tirés en usine. En construction neuve, ils sont posés au gros œuvre sur la dalle, dans la chape ou dans les saignées, puis noyés ou enduits.",[11,1019,1020],{},"Par pose libre, on entend ici des câbles sans conduit, le plus souvent du XVB : directement en saignée sous enduit, en apparent, sur chemin de câbles ou dans les vides de construction.",[26,1022,1024],{"id":1023},"preflex-et-pose-libre-comparés","Preflex et pose libre comparés",[41,1026,1027,1040],{},[44,1028,1029],{},[47,1030,1031,1034,1037],{},[50,1032,1033],{},"Critère",[50,1035,1036],{},"Preflex avec fils VOB",[50,1038,1039],{},"Pose libre en XVB",[60,1041,1042,1053,1064,1075,1086,1097],{},[47,1043,1044,1047,1050],{},[65,1045,1046],{},"Type de conducteur",[65,1048,1049],{},"Fil (H07V-U\u002F-R) sous conduit",[65,1051,1052],{},"Câble sous gaine",[47,1054,1055,1058,1061],{},[65,1056,1057],{},"Usage typique",[65,1059,1060],{},"Construction neuve, rénovation lourde",[65,1062,1063],{},"Rénovation, cave, local technique, extension",[47,1065,1066,1069,1072],{},[65,1067,1068],{},"Remplacer les fils plus tard",[65,1070,1071],{},"oui, les fils doivent rester tirables à tout moment (5.2.9.3)",[65,1073,1074],{},"seulement en ouvrant ou par un nouveau parcours",[47,1076,1077,1080,1083],{},[65,1078,1079],{},"Pose en apparent",[65,1081,1082],{},"seulement le conduit, pas le fil nu (5.2.9.5)",[65,1084,1085],{},"oui (5.2.9.5)",[47,1087,1088,1091,1094],{},[65,1089,1090],{},"Directement en saignée",[65,1092,1093],{},"sans objet",[65,1095,1096],{},"oui, dans les zones d’installation (5.2.9.10)",[47,1098,1099,1102,1105],{},[65,1100,1101],{},"Matériel",[65,1103,1104],{},"conduit plus chaque fil séparément",[65,1106,1107],{},"un câble avec tous les conducteurs",[26,1109,1111],{"id":1110},"ce-que-le-rgie-impose-pour-les-conduits","Ce que le RGIE impose pour les conduits",[11,1113,1114],{},"La sous-section 5.2.9.3 règle la pose sous conduits :",[137,1116,1117,1123,1129,1135,1141,1147],{},[140,1118,1119,1122],{},[14,1120,1121],{},"Diamètre :"," conduits et accessoires dimensionnés pour que les conducteurs se tirent et se retirent facilement après la pose (point d).",[140,1124,1125,1128],{},[14,1126,1127],{},"Rayon de courbure :"," au moins huit fois le diamètre extérieur pour les conduits thermoplastiques flexibles (point e).",[140,1130,1131,1134],{},[14,1132,1133],{},"Pas de connexions dans le conduit :"," les raccordements se font dans des boîtes de tirage ou de jonction, sur un bornier adapté (point f).",[140,1136,1137,1140],{},[14,1138,1139],{},"Conduits combustibles :"," admis uniquement s’ils sont encastrés à au moins 3 cm dans des matériaux incombustibles (point f).",[140,1142,1143,1146],{},[14,1144,1145],{},"Chaleur :"," pas de conduits thermoplastiques là où la température peut dépasser 60 °C en service normal (point f).",[140,1148,1149,1152],{},[14,1150,1151],{},"Conduits encastrés :"," ni tés ni coudes ; les conducteurs restent accessibles dans les boîtes (point i.2).",[11,1154,1155],{},"Le RGIE ne fixe pas de taux de remplissage en pourcentage. Le critère est que les conducteurs puissent être tirés et retirés à tout moment.",[26,1157,1159],{"id":1158},"ce-que-le-rgie-impose-pour-la-pose-libre","Ce que le RGIE impose pour la pose libre",[11,1161,1162],{},"Les canalisations encastrées sans conduit doivent être des câbles ; les conducteurs munis d’une seule isolation principale y sont interdits (5.2.9.10). Dans les murs des locaux s’appliquent des zones d’installation : tracés horizontaux à 25 à 35 cm sous le plafond ou au-dessus du sol, tracés verticaux au plus près d’un angle ou à 10 à 20 cm des chambranles, et au moins 0,4 cm d’enduit de recouvrement. Dans le béton ou le ciment, il faut au moins 3 cm de recouvrement.",[26,1164,1166],{"id":1165},"quelle-classe-de-réaction-au-feu-faut-il","Quelle classe de réaction au feu faut-il ?",[11,1168,1169],{},"C’est la classe CPR du câble qui compte, pas celle du conduit :",[137,1171,1172,1178,1184],{},[140,1173,1174,1177],{},[14,1175,1176],{},"Pose individuelle :"," au moins F1 ou classe Eca (5.2.7.2).",[140,1179,1180,1183],{},[14,1181,1182],{},"En faisceaux ou en nappes :"," au moins F2 ou classe Cca (5.2.7.3).",[140,1185,1186,1189],{},[14,1187,1188],{},"Dans les vides de construction :"," également F2 ou Cca (4.3.3.5 b et 5.2.9.9). Une cloison à ossature bois ou en plaques de plâtre est un vide de construction.",[11,1191,1192],{},"Sont exemptés les câbles et conduits encastrés à au moins 3 cm dans un revêtement incombustible (5.2.7.1, n° 3). Si le Preflex est noyé à au moins 3 cm dans le béton ou la chape, cette exemption s’applique. Dans un vide de construction, c’est en revanche la classe du câble et du conduit qui compte (5.2.9.9 avec 5.2.7.3 et 5.2.7.4).",[26,1194,1196],{"id":1195},"quelle-méthode-choisir","Quelle méthode choisir ?",[137,1198,1199,1205,1211,1217,1223],{},[140,1200,1201,1204],{},[14,1202,1203],{},"Construction neuve :"," Preflex avec fils VOB, noyé ou enduit dans les dalles et les murs.",[140,1206,1207,1210],{},[14,1208,1209],{},"Rénovation avec saignées :"," XVB directement en saignée, dans les zones d’installation.",[140,1212,1213,1216],{},[14,1214,1215],{},"Cave, garage, local technique :"," XVB en apparent ou sur chemin de câbles.",[140,1218,1219,1222],{},[14,1220,1221],{},"Ossature bois, cloisons sèches, faux plafond :"," câble au moins Cca ou système de conduits adapté.",[140,1224,1225,1228],{},[14,1226,1227],{},"Rénovation partielle :"," combiner les deux ; nouveaux circuits en Preflex, canalisations existantes conservées après vérification.",[11,1230,1231,1232,1236,1237,265],{},"Pour les types de câbles, voir ",[256,1233,1235],{"href":1234},"\u002Ffr\u002Fblog\u002Fcable-xvb-vs-vob","Câble XVB ou VOB"," ; pour la systématique complète, ",[256,1238,1240],{"href":1239},"\u002Ffr\u002Fblog\u002Fmodes-de-pose-rgie","Modes de pose selon le RGIE",[26,1242,1244],{"id":1243},"articles-associés","Articles associés",[137,1246,1247,1253,1259,1265],{},[140,1248,1249],{},[256,1250,1252],{"href":1251},"\u002Ffr\u002Fblog\u002Frgie-2026-changements","Que change le RGIE 2026 ?",[140,1254,1255],{},[256,1256,1258],{"href":1257},"\u002Ffr\u002Fblog\u002Fsalle-de-bain-cables-rgie-zones","Électricité salle de bain : zones et types de câbles",[140,1260,1261],{},[256,1262,1264],{"href":1263},"\u002Ffr\u002Fblog\u002Fancien-rgie-part-8","Ancien bâtiment et RGIE Partie 8",[140,1266,1267],{},[256,1268,1270],{"href":1269},"\u002Ffr\u002Fblog\u002Frenovation-rgie-plans-electriques","Rénovation et RGIE : quand faut-il de nouveaux plans électriques ?",[11,1272,1273],{},[299,1274,1275,1276,1278,1279],{},"Planifiez votre installation électrique avec ",[14,1277,304],{},", en construction neuve avec Preflex ou en rénovation avec pose libre : vous enregistrez mode de pose et type de câble pour chaque câble, et exportez schéma unifilaire et plan de position en PDF. L’autocontrôle signale les câbles en cloison creuse sous Cca sans conduit documenté. ",[256,1280,1282],{"href":1281},"\u002Ffr","Commencer gratuitement →",[11,1284,1285],{},[299,1286,1287,1288,265],{},"Base réglementaire : RGIE Livre 1, version 06, sous-sections 4.3.3.5, 5.2.7.1 à 5.2.7.3, 5.2.9.3, 5.2.9.5, 5.2.9.9 et 5.2.9.10. Texte officiel : ",[256,1289,1291],{"href":970,"rel":1290},[319],"SPF Économie",{"title":322,"searchDepth":323,"depth":323,"links":1293},[1294,1295,1296,1297,1298,1299,1300],{"id":1013,"depth":323,"text":1014},{"id":1023,"depth":323,"text":1024},{"id":1110,"depth":323,"text":1111},{"id":1158,"depth":323,"text":1159},{"id":1165,"depth":323,"text":1166},{"id":1195,"depth":323,"text":1196},{"id":1243,"depth":323,"text":1244},"Gaine Preflex ou XVB posé directement ? Comparatif construction neuve et rénovation en Belgique, avec les règles du RGIE sur conduits, classes de feu et zones d’installation.","fr",{},"\u002Fblog\u002Fpreflex-vs-open-wiring.fr",{"title":997,"description":1301},"Preflex ou pose libre : quelle méthode de câblage ?","preflex-vs-pose-libre","blog\u002Fpreflex-vs-open-wiring.fr",[349,1310,1311,1312,1313,1314,355],"câblage","construction neuve","rénovation","RGIE","sécurité incendie","965tUNcYvOE2TKBw8VJjLn8XJvl7Le7Y6bx5ZSZrSpI",{"id":4,"title":5,"articleId":6,"body":1317,"category":332,"date":333,"description":334,"extension":335,"image":24,"lastUpdated":336,"locale":337,"meta":1527,"navigation":339,"ogImage":340,"path":341,"publishDate":333,"readTime":342,"refreshInterval":343,"seo":1528,"seoTitle":345,"slug":346,"stem":347,"tags":1529,"__hash__":356},{"type":8,"value":1318,"toc":1518},[1319,1323,1327,1329,1331,1333,1335,1397,1399,1401,1427,1429,1431,1433,1435,1437,1451,1453,1455,1477,1483,1485,1503,1511],[11,1320,1321,17],{},[14,1322,16],{},[11,1324,1325],{},[21,1326],{"alt":23,"src":24},[26,1328,29],{"id":28},[11,1330,32],{},[11,1332,35],{},[26,1334,39],{"id":38},[41,1336,1337,1347],{},[44,1338,1339],{},[47,1340,1341,1343,1345],{},[50,1342,52],{},[50,1344,55],{},[50,1346,58],{},[60,1348,1349,1357,1365,1373,1381,1389],{},[47,1350,1351,1353,1355],{},[65,1352,67],{},[65,1354,70],{},[65,1356,73],{},[47,1358,1359,1361,1363],{},[65,1360,78],{},[65,1362,81],{},[65,1364,84],{},[47,1366,1367,1369,1371],{},[65,1368,89],{},[65,1370,92],{},[65,1372,95],{},[47,1374,1375,1377,1379],{},[65,1376,100],{},[65,1378,103],{},[65,1380,106],{},[47,1382,1383,1385,1387],{},[65,1384,111],{},[65,1386,114],{},[65,1388,117],{},[47,1390,1391,1393,1395],{},[65,1392,122],{},[65,1394,125],{},[65,1396,128],{},[26,1398,132],{"id":131},[11,1400,135],{},[137,1402,1403,1407,1411,1415,1419,1423],{},[140,1404,1405,145],{},[14,1406,144],{},[140,1408,1409,151],{},[14,1410,150],{},[140,1412,1413,157],{},[14,1414,156],{},[140,1416,1417,163],{},[14,1418,162],{},[140,1420,1421,169],{},[14,1422,168],{},[140,1424,1425,175],{},[14,1426,174],{},[11,1428,178],{},[26,1430,182],{"id":181},[11,1432,185],{},[26,1434,189],{"id":188},[11,1436,192],{},[137,1438,1439,1443,1447],{},[140,1440,1441,200],{},[14,1442,199],{},[140,1444,1445,206],{},[14,1446,205],{},[140,1448,1449,212],{},[14,1450,211],{},[11,1452,215],{},[26,1454,219],{"id":218},[137,1456,1457,1461,1465,1469,1473],{},[140,1458,1459,227],{},[14,1460,226],{},[140,1462,1463,233],{},[14,1464,232],{},[140,1466,1467,239],{},[14,1468,238],{},[140,1470,1471,245],{},[14,1472,244],{},[140,1474,1475,251],{},[14,1476,250],{},[11,1478,254,1479,260,1481,265],{},[256,1480,259],{"href":258},[256,1482,264],{"href":263},[26,1484,269],{"id":268},[137,1486,1487,1491,1495,1499],{},[140,1488,1489],{},[256,1490,277],{"href":276},[140,1492,1493],{},[256,1494,283],{"href":282},[140,1496,1497],{},[256,1498,289],{"href":288},[140,1500,1501],{},[256,1502,295],{"href":294},[11,1504,1505],{},[299,1506,301,1507,305,1509],{},[14,1508,304],{},[256,1510,309],{"href":308},[11,1512,1513],{},[299,1514,314,1515,265],{},[256,1516,320],{"href":317,"rel":1517},[319],{"title":322,"searchDepth":323,"depth":323,"links":1519},[1520,1521,1522,1523,1524,1525,1526],{"id":28,"depth":323,"text":29},{"id":38,"depth":323,"text":39},{"id":131,"depth":323,"text":132},{"id":181,"depth":323,"text":182},{"id":188,"depth":323,"text":189},{"id":218,"depth":323,"text":219},{"id":268,"depth":323,"text":269},{},{"title":5,"description":334},[349,350,351,352,353,354,355],[]]