Changing ceiling rose in a new build house

[Risteard]

Using brown and blue makes identifying the switched live much easier, and saves carrying two lots of cable around.

I've never had a problem with twin brown. Anyway, it is often irrelevant which one is the switched return for the phase conductor (e.g. 1-way switching).

 

[Risteard]

What a load of cobblers.

How is it cobblers. BS 7671 states that identification of conductors are "preferably throughout their length". So there clearly is a preference stated.

Here many would make you rip it out if you installed brown & blue (even if it was sleeved). It is considered bad practice here. And if I drive just 1.5 miles and cross the border it is expressly prohibited.

 

[sparksburnout]

Because its bloody obvious to anyone that if its a switch drop both conductors are likely to be live. Sleeving is perfectly acceptable, IMO.

 

[davesparks]

How is it cobblers. BS 7671 states that identification of conductors are "preferably throughout their length". So there clearly is a preference stated.

Here many would make you rip it out if you installed brown & blue (even if it was sleeved). It is considered bad practice here. And if I drive just 1.5 miles and cross the border it is expressly prohibited.

Out of interest, what do you do for a two gang switch? Do you use a three core and sleeve the black and grey or would you run a twin brown and a single?

 

[Risteard]

Because its bloody obvious to anyone that if its a switch drop both conductors are likely to be live. Sleeving is perfectly acceptable, IMO.

No-one said it wasn't - simply that correctly identified conductors throughout their length is better.

 

[Risteard]

Out of interest, what do you do for a two gang switch? Do you use a three core and sleeve the black and grey or would you run a twin brown and a single?

Almost always twin brown for strappers and singles either end (presuming you mean 2-way).

Although some use 3-core, I would say the majority don't. Again, across the border the use of 3-core (or three-phase cable as they describe it) is not permitted.

 

[sparksburnout]

Almost always twin brown for strappers and singles either end (presuming you mean 2-way).

Although some use 3-core, I would say the majority don't. Again, across the border the use of 3-core (or three-phase cable as they describe it) is not permitted.

OOeerrrr

 

[davesparks]

Almost always twin brown for strappers and singles either end (presuming you mean 2-way).

Although some use 3-core, I would say the majority don't. Again, across the border the use of 3-core (or three-phase cable as they describe it) is not permitted.

I meant a 2 gang, 1 way. So I would run a three core from the rb4 to the switch, brown for common and black and grey for the two switched lives

 

[Risteard]

I meant a 2 gang, 1 way. So I would run a three core from the rb4 to the switch, brown for common and black and grey for the two switched lives

With a 2-gang 1-way just a twin brown from one of the luminaires, and then a single to the other luminaire with the commons bridged in the switch.

 

[davesparks]

With a 2-gang 1-way just a twin brown from one of the luminaires, and then a single to the other luminaire with the commons bridged in the switch.

Which wouldn't happen over here as we don't have sheathed singles available.
So for me it would be a three core to the switch from the rb4 and a twin to each light from the rb4

 

[Risteard]

Which wouldn't happen over here as we don't have sheathed singles available.

I wasn't aware of that. PVC/PVC single brown or brown & earth, or single blue (or unusually blue & earth) are readily available here.

 

[davesparks]

I wasn't aware of that. PVC/PVC single brown or brown & earth, or single blue (or unusually blue & earth) are readily available here.

I wish they were available, it would make some things a lot more simple/logical

 

[telectrix]

Which wouldn't happen over here as we don't have sheathed singles available.
So for me it would be a three core to the switch from the rb4 and a twin to each light from the rb4

i wouldn'tcall this unavailable:


Welcome to Doncaster Cables - Single Core PVC Insulated, PVC Sheathed Cables

 

[davesparks]

i wouldn'tcall this unavailable:


Welcome to Doncaster Cables - Single Core PVC Insulated, PVC Sheathed Cables

Yeah but when was the last time it was commonly stocked by a wholesaler?

 

[telectrix]

point taken. shame as it's very useful for strapping the exhaust back up on a landrover.