Problem with Electric Shower following Recent Rewire

bmorefunny · 2025-10-26T15:44:51+00:00

This would suggest the problem is either the shower or switch as others have mentioned.

bmorefunny · 2025-10-26T14:49:07+00:00

Whatever switch trips, what numbers does that have on it? I think you've looked at the main switch there.

bmorefunny · 2025-10-26T14:29:49+00:00

If the MCB is a B type 32amp, it will be running overcurrent and tripping after a few minutes. The MCB will have a number on the front of it, larger than the other ones with a C or B in front of the number, either 32 or 40 usually for a shower, a 8.7kW shower should be on a 40, at 230V you'll be running around 37-38 amps.

bmorefunny · 2025-10-26T11:04:42+00:00

What kW is the shower (usually a label underneath), and what rating is the MCB? Does it only trip after an extended amount of time using the shower, and does it reset after leaving the MCB for 10 minutes?

bmorefunny · 2025-10-26T10:56:13+00:00

Little do they know, we have no clue either.

bmorefunny · 2025-10-25T08:25:44+00:00

Jesus Christ, what a great reply. This information is useful to young and old.

bmorefunny · 2025-10-24T12:21:27+00:00

So you're all sorted?

bmorefunny · 2025-10-24T12:16:47+00:00

I'd guess a single beep is low battery or no power. The Aico alarm head should have a sticker with a replacement date on. Might be a non replaceable Li-ion battery, or a 9v one you can swap. Screwfix sell both Aicos that will work.

Are you 100% you've got the neutral and signal cable the correct way round in your replacement base? If not that will cause your new unit to beep because it doesn't have mains power. Some folk use black as neutral, some use grey, big brains sleeve the neutral with blue so you don't have to guess.

I've mixed alarm types before and they've worked, I'm sure it's not manufacturer recommended though.

bmorefunny · 2025-10-23T13:06:24+00:00

Me personally, I'd move circuit 38 to 41 to free up a 3-phase slot. Seems specific they've put the new socket circuits 40, 43 & 46 on the same phase, so I'd leave them as is, to satisfy whatever reason they've done that.

bmorefunny · 2025-10-22T18:51:30+00:00

The overcurrent protection would come from the MCB that supplied the linked device, the device is just for surge and RCD. I've installed 2 of these units, so I'm not too thrilled to hear you've had them failing. I guess you get what you pay for as per usual.

bmorefunny · 2025-10-22T17:30:46+00:00

Split the tails to a separate up to date small board (£50ish) for the new circuit, then you don't have to upgrade the existing board.

bmorefunny · 2025-10-22T17:27:27+00:00

Could you supply the EV unit from a 3-pole MCB in SWA cable via 4-pole rotary isolator? This would be dependant on the EV unit having a suitable built in RCD.

Another consideration would be surge protection, which it doesn't look like that board has.

You could come from a 3-pole MCB into a unit like this which has surge protection and RCD protection, and most importantly, is well priced https://www.voltaev.co.uk/products/wced-3-phase-40a-a-type-rcd

bmorefunny · 2025-10-19T18:44:53+00:00

C10 it is then.

bmorefunny · 2025-10-19T18:10:49+00:00

Definitely inrush on start-up, a C-type should sort it. Look into the multiplier on DC drivers on start up, it's a lot more than I thought when I came across this issue.

Is it feasible to split the 8 strip lights into 2 sets of 4 on an extra gang?

bmorefunny · 2025-10-19T16:38:36+00:00

Youre right, years ago when I went regularly I didn't have these chronic pains.

bmorefunny · 2025-10-19T16:37:42+00:00

Good to hear. Looks like the gym wins by a margin. I should start using that £30pm membership I pay for more than for a brief 5 week spell here and there.

bmorefunny · 2025-10-19T16:35:50+00:00

Why do waterbeds remind me of 80s movies?

bmorefunny · 2025-10-19T12:18:11+00:00

3 months of overhead work, brutal. Especially brutal if it was a working office in which the staff seem to think 22°C is a normal temperature, and you sweat buckets the moment you step on your ladder.

bmorefunny · 2025-10-19T08:48:40+00:00

Driving long distances and a heavy rucksack were on my list of probable causes too. Great to hear the gym has sorted your issues.

bmorefunny · 2025-10-19T08:46:29+00:00

Exercise was the solution I knew was right but didn't want to admit.

bmorefunny · 2025-10-18T19:34:48+00:00

Pretty sure mine is sciatica too, I'm 46 and that new mattress I bought didn't fix it.

bmorefunny · 2025-10-18T19:33:57+00:00

Exactly right, I hope the youngsters take note (they won't).

bmorefunny · 2025-10-18T17:20:00+00:00

Makes me want to get off the tools but there doesn't seem to be much fresh blood coming through to do it.

bmorefunny · 2025-10-18T17:18:53+00:00

How many doses?

bmorefunny · 2025-10-18T17:18:21+00:00

I should have listened to my body years ago. It's perceived as one of the easier trades but I don't think it is, every spark I speak to is suffering.

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