Boiler FCU Spur question

[chrisgc]

Hi

Just wondering what your opinions are when it comes to installing an FCU for a boiler?

1) On its own circuit?
2) Off a lighting circuit?
3) Off a ring main circuit?

What are the pros and cons if any etc?

I am about to do one and was wondering what the general feeling is about it.

Chris

 

[Deleted member 26818]

I prefer a separate circuit.

 

[IQ Electrical]

Hi

Just wondering what your opinions are when it comes to installing an FCU for a boiler?

1) On its own circuit?
2) Off a lighting circuit?
3) Off a ring main circuit?

What are the pros and cons if any etc?

I am about to do one and was wondering what the general feeling is about it.

Chris

Option 1 or 3 depending on logistics....

 

[telectrix]

1. or 3. but not 2. IMO.

 

[PC Electrics]

3) ring final circuit (sockets)
4) radial socket circuit


All are valid solutions. Do whatever is easiest for the particular job at hand. Obviously circuit loading is especially important to consider with option 2)

 

[sparks_114]

If it's a new install then definitely option 1. If not then whatever is easiest though I've never come off the lighting.

 

[chrisgc]

I have a spare way in CU so may go for the seperate circuit.

What kind of size cb am I looking at? and is 1.5mm cable size sufficient?

 

[Deleted member 26818]

Yes 1.5mm² should be sufficient, obviously dependant on load, length of circuit and installation method.

 

[sparks_114]

Yes 1.5mm² should be sufficient, obviously dependant on load, length of circuit and installation method.

You would still include a 3A switched FCU local to the boiler right?

 

[Ponty Massive]

You would still include a 3A switched FCU local to the boiler right?

Yeah. 1.5 T+E from the board with 6/10a MCB

 

[IQ Electrical]

This is a 6kW electric boiler, that 10A MCB might not hold!

 

[Ponty Massive]

This is a 6kW electric boiler, that 10A MCB might not hold!

...oh well then, keep the 1.5 T+E and just bang in a 40a MCB..........TAXI !!!

 

[chrisgc]

You would still include a 3A switched FCU local to the boiler right?

Yes an FCU will be included. Should the FCU be one with a flex outlet for the plumber to connect boiler????

Or can it just be a normal FCU?

 

[telectrix]

6kw boiler? thats almost up to mother-in-law size

 

[sparks_114]

This is a 6kW electric boiler, that 10A MCB might not hold!

But the good old 1.5 Pyro will !

 

[sparks_114]

Yes an FCU will be included. Should the FCU be one with a flex outlet for the plumber to connect boiler????Or can it just be a normal FCU?

Depends on the setup there. It could be a flex coming out of the FCU or it could somehow come from behind. Either or.

 

[Ponty Massive]

But the good old 1.5 Pyro will !

whooarrr.....Now your talking old school..

 

[telectrix]

But the good old 1.5 Pyro will !

and the 40A+ will soon dry out the MI.

 

[Ponty Massive]

But the good old 1.5 Pyro will !

When I were t'kid, I'd sit there with nothing more than a bag full of pots, an L bar and old wireless radio..

 

[IQ Electrical]

When I were t'kid, I'd sit there with nothing more than a bag full of pots, an L bar and old wireless radio..

Ah yes, a bag full of pot.....

 

[sparks_114]

and the 40A+ will soon dry out the MI.

First it was 6kw and now she wants 9kw. Where is this all gonna stop!

 

[IQ Electrical]

First it was 6kw and now she wants 9kw. Where is this all gonna stop!

It's all my fault, I was bored and the OP never mentioned GAS boiler or COMBI so I thought I'd spice it up a little

Just goes to show how assumptions are made on these 'crystal ball' designs!