Wiring in whirlpool bath via switched spur

[sirclinton]

Hi there,

I intend to wire up 3 appliances, 1) air pump, 2) water pump and 3) the led lights. To do this I will join or common up the two pumps under the bath and run a single cable through the wall out to the kitchen. Here I will replace a double socket which is a spur off the main with one 13amp FCU for the pumps. This FCU I will connect to another 3 amp FCU, via cable from the main in on the 13amp FCU to the main in on the 3amp. Obviously the two pumps will have one cable from the 13amp, and the lights a acble from the 3 amp. Ok, so just a few questions on this.

1) Is this acceptable, as I won't be running anything else via sockets etc of the spur.

2) For connecting the wires under the bath, are standard non waterproof connectors OK, being under a paneled bath and elevated off the floor. The socket ring is also RCD protected.

3) Are there any other considerations I have missed.

Many thanks in advance

 

[Taylortwocities]

Yes, This is electrical work in a bathroom. So you must raise a building notice with your local authority BEFORE you start work.

The LABC will charge you a fee and will want to inspect the work at regular intervals. They will then expect you to properly test what you have done meets BS7671 using your calibrated test equipment.
Of course, you'll need to produce an installation certificate to confirm this.

More info at //www.diynot.com/wiki/Electrics:part_p:DIY-Electrical-Work-and-the-Law

Or you could use a CPS registered electrician at significantly less cost.

 

[sirclinton]

Ok thanks, but as far as the design goes all is well?

 

[sirclinton]

I'd still like to know the answers to Q 1&2..

As for the notified work...

This is a fcu from a spur located outside the bathroom. Under the bath isn't classed as a zone. So is it still notifiable as the wiring from under the bath will be connected in another room? Lots of conflicting information on this thread:

//www.diynot.com/forums/viewtopic.php?t=187171

especially

"well, the OP did specifically state that

"have fitted a Switched Fuse Spur off of the ring main"

So doesn't sound like a new circuit to me.

In which zone in the (assumed) bathroom is the electrical installation to be found? If it's not in a 'zone' it doesn't have to be notified. If it's under the bath and only accessible with a tool it's outside the zones.

Giddy Up icon_biggrin.gif"

 

[flameport]

Where are the LED lights?

 

[sirclinton]

The lights are sealed into the bath at the factory, and the supply is under the bath, same as the pumps but I will feed them via its own cable to the other FCU as described..

 

[flameport]

You can't have 2 FCUs from the same point on the ring.

Therefore a 13A FCU with the outlet connected to the pumps and the additional 3A FCU for the light.
The single 13A FCU controls the whole lot.

Presumably the bath has some other controls on it for the pumps etc., otherwise it will be rather inconvenient switching it on from the kitchen.

As the lights are in the bath, they are in zone 0 and the work is notifiable.

Supplementary bonding may be required.

 

[sirclinton]

You can't have 2 FCUs from the same point on the ring.

Therefore a 13A FCU with the outlet connected to the pumps and the additional 3A FCU for the light.
The single 13A FCU controls the whole lot.

Presumably the bath has some other controls on it for the pumps etc., otherwise it will be rather inconvenient switching it on from the kitchen.

As the lights are in the bath, they are in zone 0 and the work is notifiable.

Supplementary bonding may be required.

Thanks, so to clarify you are saying it's ok for two FCU's but with the 13A connected as a spur and the out connected to the 3A in. Thats how I look at it making sense an dthe 13A switch would isolate them both.

Also are the standard connection under the bath ok, thats what I have been told ie they don't need to be special waterproof joiners or anything. I have an electrician coming to look at it and do the work due to the regs, but I like to know how it's going to work anyway.