heaters

[Philip Thrower]

Go Wales Go. seriously, I have a separate ring main 2.5 cable on a 32 mcb. It has 7 1kw heaters connected. Does this sound okay. The electrician has signed it off ?

 

[Octopus]

Have you asked the spark who signed it off?

 

[davesparks]

It sounds like a slightly unconventional use of the ring circuit, but any half decent electrician will be able to design such a circuit to fully comply with the regulations.

Why do you think that it may not be ok?

 

[AndyL]

Regulations recommend not too

 

[davesparks]

Regulations recommend not too

Do they? Which regulation would that be then?

 

[AndyL]

Do they? Which regulation would that be then?

Appendix 16 note ii " not supplying immersion heaters, comprehensive electric space heating ​or similar"

 

[M-Ty]

More information, please:
Are the heaters supplied from FCUs with no socket outlets on the circuit and therefore not a ring circuit for general use?
Are the heaters rated 1kW at 240V or 230V?
Are they thermostatically controlled?

 

[Pete999]

Go Wales Go. seriously, I have a separate ring main 2.5 cable on a 32 mcb. It has 7 1kw heaters connected. Does this sound okay. The electrician has signed it off ?

Do you mean he has the heaters connected to Ring Circuit, or do you mean as a layman he has used cable normally associated with Ring Circuits AKA 2.5mm????

 

[davesparks]

Appendix 16 note ii " not supplying immersion heaters, comprehensive electric space heating ​or similar"

That is not a regulation, and it is also concerned with a ring final serving socket outlets. The OP is talking about a ring which has been designed and installed specifically to serve heating points.

 

[AndyL]

That is not a regulation, and it is also concerned with a ring final serving socket outlets. The OP is talking about a ring which has been designed and installed specifically to serve heating points.

Granted it is not a regulation, but it is guidance on the use of reg 433.1
It is concerned with RFCs using socket outlets and FCUs which I assume is being used here

 

[Octopus]

Granted it is not a regulation, but it is guidance on the use of reg 433.1
It is concerned with RFCs using socket outlets and FCUs which I assume is being used here

I read the OP as if the circuit is exclusively for the 1Kw panel heaters, so it doesn't apply IMHO

 

[AndyL]

I read the OP as if the circuit is exclusively for the 1Kw panel heaters, so it doesn't apply IMHO

But surely the heaters will be connected via BS1363 FCUs making it a RFC as per 433.1.204

 

[AndyL]

I think I would of preferred two 20A radial circuits

 

[davesparks]

I think I would of preferred two 20A radial circuits

That doesn't make it wrong though.

 

[davesparks]

Granted it is not a regulation, but it is guidance on the use of reg 433.1
It is concerned with RFCs using socket outlets and FCUs which I assume is being used here

Just take a step back from your blinkered approach to the regulations for a minute and try a bit of independent thinking. Yes you could argue all day long that it could be treated as if it was the standard circuit featured in the appendix. But it doesn't have to be an adaption of. A standard circuit, it is a circuit which has been designed for this specific installation. There is nothing to say that you may only use the standard circuit arrangements in 7671, they are just there for convenience in basic installations.
Anyone with some sense and a bit of knowledge can design perfectly compliant circuits without using the standard circuits.

It's no different to the infamous lollipop circuit,