138/240Y System

[Bobster]

Because you would still have a dangerously high potential to earth at the lamp fitting.

So mr.homeowner could inadvertently touch something lethal changing a blown lamp.

 

[Cookie]

Only if he or she were to stick their fingers in the Bayonet.

 

[Bobster]

Only if he or she were to stick their fingers in the Bayonet.

Exactly, not entirely unforeseeable. .

 

[davesparks]

Even for switching off a light? Can't see the reasoning.

Because lightswitches are the means of isolation for each light fitting therefore need to isolate all conductors.

 

[Cookie]

You guys have a BS7671 code section?

 

[Bobster]

You guys have a BS7671 code section?

https://shop.------.org/bs-7671-201...ions-iet-wiring-regulations-18th-edition-blue

Against copywrite to publish them online, however if your interested you can purchase them.

 

[westward10]

Because lightswitches are the means of isolation for each light fitting therefore need to isolate all conductors.

A light switch generally does not provide isolation it is a functional device to control a light.

 

[Cookie]

https://shop.------.org/bs-7671-201...ions-iet-wiring-regulations-18th-edition-blue

Against copywrite to publish them online, however if your interested you can purchase them.

I have copy of BS7671, just need the number which points me to the code section requiring double pole switching.

 

[Cookie]

A light switch generally does not provide isolation it is a functional device to control a light.

Exactly my thoughts and how the NEC views it. Control vs a disconnecting means are two different things.

As is I doubt there is much concern with a GU24 socket.