A little wiring advice

[Robster84]

Hi all. I am looking to install a pump in my boiler cupboard. The cupboard is next to the bathroom. The 90 degree pipe in the corner is the hot water feed from the storage tank to the sink/bath. The only power in the cupboard is the boiler supply. Can this be spurred from for a single socket?
http://www.diynot.com/diy/media/dsc_0053.96007/full

 

[Iggifer]

What kind of pump are we talking? A CH pump or a shower pump?

If the former, you'd be better off wiring it into your CH wiring centre, if you have one.
If the latter, if that spur is part of a dedicated boiler supply then the chances are good you can use it, you'd want it to be at least a 10/16A breaker, and I'd pull the cable out of the existing spur, put it into the supply side of the new spur, then take a new piece of cable from the supply side new spur to the supply side of the spur. This is assuming the boiler is on a 3A fuse and the shower pump on a 5A fuse (can't see either needing much more of a supply than that)

 

[Robster84]

It will be a single outlet shower pump. I have checked the fuse box and there is no breaker dedicated to the boiler

The boiler is on a 3a fuse

 

[ericmark]

I ran a power shower from a B6 MCB without a problem but the power shower comes with different flow rates and pressures some one hardly needs soap the pressure and flow is so high.

But in the main even a 3 amp fuse in a FCU would be enough. Clearly needs RCD protection as well. However one is not allowed to pump from the mains supply so when the combi boiler was installed the law required the power shower to be removed.

The picture

seems to show a filling pipe used with combi boilers so I question if your allowed to fit the pump?

 

[winston1]

I have checked the fuse box and there is no breaker dedicated to the boiler

In which case that FCU is quite likely a spur off the ring final and you cannot take another spur off it.

 

[DaveHerns]

Can't you spur off the FCU as the current is limited by the fuse in the FCU?

 

[winston1]

Can't you spur off the FCU as the current is limited by the fuse in the FCU?

Only if you spur off the output.

But the suggestion was:
"I'd pull the cable out of the existing spur, put it into the supply side of the new spur, then take a new piece of cable from the supply side new spur to the supply side of the spur".

Which you cannot do if thr spur is off a ring final.

 

[Robster84]

This is a condenser boiler, Also isn't the mains supply a reference to the cold water entering the house? I am wanting to pump the hot water into the bathroom from the hot water storage tank. If i have to, i can fit the pump into the cylinder cupboard and use the CH wiring centre

 

[Robster84]

Can't you spur off the FCU as the current is limited by the fuse in the FCU?

Only if you spur off the output.

But the suggestion was:
"I'd pull the cable out of the existing spur, put it into the supply side of the new spur, then take a new piece of cable from the supply side new spur to the supply side of the spur".

Which you cannot do if thr spur is off a ring final.

When you say 'spur off of the output', is this what you mean?

 

[Robster84]

Change of plan. Our bedroom is the other side of the boiler cupboard and there is a socket by the adjoining wall so i have been told that i can spur off of that socket with another socket