Is this right ??

[Spudnik]

if immersion on its own circuit ie 16a whats the problem in fitting a spur unit adj immersion spur and fusing it at 3a for shower pump

The water heater should be on its own dedicated radial (im sure there is a reg).

However, there is nothing to stop you from dissing the immersion and swapping out the 20ADP switch for a single socket, providing there is RCD protection.

 

[MarkieSparkie]

if immersion on its own circuit ie 16a whats the problem in fitting a spur unit adj immersion spur and fusing it at 3a for shower pump

OSG Appendix H5; EGBR 4.5 and GN1 C4 advise "Water heaters fitted to storage vessels >15 litres ... should be supplied by their own separate circuit."

 

[lamb]

That advice is to discourage the immersion heater from being connected to a ring final circuit (as it is a fixed load over 2kw).
As benji said, there is no problem with adding to a dedicated radial as long as the circuit remains compliant.
Adding a negligible load such as water pump, heating controls, etc. would never really present a problem IMO.
Just a MEIWC required, and part P notification.

 

[SPARTYKUS]

Except its not allowed in the regs, and is bad practise. MarkieSparkie's post makes it clear!

Depends on the pump as to how negligible it is!!! Seen some heffing great shower pumps lamb.

The point about an immersion is TIME, it could be on at 100% for hours.

 

[Amp David]

Its crazy these stores such as Homebase and Wickes using there own teams as they call them.

I was walking out of Wickes back to the van last November, when 2 chaps pulled up in a little battered combi van, wearing nice new Wickes installation team uniforms. One of em asked if i was an electrician, I asked why and he said they had just replaced a fan in the bathroom they were installing and it wasn't working.

Didn't even offer them advice, instead just said it doesn't get much easier than a fan mate, then chuckled to myself. Then heard them say to each other that they were going back into Wickes to get themselves a neon tester! Gods truth!!!

 

[shocking_eg]

if immersion on its own circuit ie 16a whats the problem in fitting a spur unit adj immersion spur and fusing it at 3a for shower pump

nothing wrong IMO either with this. a radial is a radial at the end of the day as long as its got RCD protection that is.

 

[SPARTYKUS]

bluebook: showers > valves & fittings > shower pumps


I'll let people work out from this link why it says in the regs not to spur off immersion....

 

[oldtimer]

if immersion on its own circuit ie 16a whats the problem in fitting a spur unit adj immersion spur and fusing it at 3a for shower pump

Benji you are on a slippery slope here why this regulation is not inforce because thats the way it is if you put a clamp probe on an immersion heater you get about 13.8 amps now on a 16 amp circuit breaker you cannot say a well thats 2.2 amps to play with I have seen a socket spurred off an immersion circuit and then someone has come alaong and spurred a twin off this with a convector heater plugged in the only reason the circuit did not trip as there was a 15 amp 3036 fuse protecting it. I have mentioned this before on this forum I seen a guy who spurred a bathroom wall light off a shower circuit and all I got was why not why not the reason why we have regs is that we are not a 3rd world country with 3rd world death rates plus you could say I am the safest driver in the world so I dont need air bags in my car but try telling the clown who has had a few pints and hits you head on remember laws and regulations are not there just to protect you from the world sometimes they are there to protect you from yourself

 

[benji]

only said 16a as a ballpark figure you could increase it to 20a feeding the fused spurs .but looking back at the original thread i seem to have gone off track a bit

 

[shocking_eg]

lets forget about the spur issue before some of us get in a hissy ! lol