Electrical Conduits

[teresa Dipple]

Does anyone have information about the use of grey flexible electrical conduit. How many circuits are allowed in one conduit? Can you mix power and lighting in same conduit?

[La Guerriere]

You can put either cable or individual conductors in conduit (gaine). General rule is no more than 1/3 of the area. so that wires can be pulled through. Typically use 16mm gaine for lighting 3 x 1.5mm2, 20mm gaine for power 3 x 2.5mm2.

This sometimes works:

http://electric.system.free.fr/fiches/fiches.html#calculettes

[La Guerriere]

Sorry, try:

http://electric.system.free.fr/fiches/fiches.html#calculettes

[teresa Dipple]

I need to supply an out area with 1 x light and 1 x power. Do you know if the singles (1.5mm & 2.5mm) can be pulled through the same conduit as one would be on a 16amp MCB and the other on a 20amp MCB? regards Teresa

[La Guerriere]

I think you are OK on this, and would need 25mm gaine.

[Nick Trollope]

As Jim says, this is OK, but you must have seperate earths for the 2 circuits - 6 wires in total. Be careful that you don't break the "double insulation" rule when you seperate the feeds.

[fulcrum]

[quote user="nicktrollope"]As Jim says, this is OK, but you must have seperate earths for the 2 circuits - 6 wires in total. Be careful that you don't break the "double insulation" rule when you seperate the feeds.

[/quote]

What is the "double insulation" rule?

[teresa Dipple]

what do you mean by the double insulation rule?

[teresa Dipple]

Thanks for all your info. (The glossary is brilliant) Do you know why within a domestic building the french seem to prefer to use 'gaine' which must be more bulky than using 3 core cable - eg U1000 R02-V except their 3 core is more rigid. As an elecrician I have been use to installing conduit with singles in a commercial or industrial environment but never in a domestic situation. (Some tubing/caping is required on drops on plastered walls but thats for mechanical protection)

[Iceni]

[quote user="teresa Dipple"]Thanks for all your info. (The glossary is brilliant) Do you know why within a domestic building the french seem to prefer to use 'gaine' which must be more bulky than using 3 core cable - eg U1000 R02-V except their 3 core is more rigid. As an elecrician I have been use to installing conduit with singles in a commercial or industrial environment but never in a domestic situation. (Some tubing/caping is required on drops on plastered walls but thats for mechanical protection)[/quote]

AFAIK it is not preference for gaine but rules.

John

not

[La Guerriere]

The French logic appears to be that it should be possible to pull out and replace wiring if necessary i.e. individual conductors in gaine or cable in gaine if built into a wall. Cable is allowed if surface run or accessible.

[powerdesal]

So if cable is run inside skirting boards its ok without gaine ??????????????