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Under sink heater wiring qiestion
Anonymous user 23/02/2024 - 3.45 PM
Hi, I am wiring up a 5.5kW water heater which all is straight forward apart from part of the instruction which is it needing a 23.9 amp fuse. It mentions it needs a fuse switch which makes sense however finding this switch at this amp does not seem to exist! It needs a 2.5mm cable it is just the fuse part that stumped me. Any help would be appreciated
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7 Answers
MK electrical
Rating: 5 out of 5
From that info it needs at least 4mm cable depending on the installation method and the appropriate breaker.
You obviously need to contact a trained electrician.
Answered9 February 2022
1
DEACON ELECTRICAL SERVICES
Rating: 5 out of 5
You need a 4mm cable at least, depending on method of installation, length of run etc, and a 32 amp ‘fuse’ you can’t use a Fused switch, but you need an isolator, local to the water heater. All this on a dedicated circuit from fuse board or consumer unit. So, as you can see, it’s not that straight forward. I really would suggest using a proper electrician to do this.
Answered9 February 2022
1
Chime Electrical Services
Rating: 5 out of 5
You should definitely not be doing this install yourself. Employ a qualified and registered electrician to do it.
Answered9 February 2022
1
A1S Electrical Services
No reviews yet
A fused spur only goes up to 13Amps. Your appliance is rated at 23.9 amps meaning you will have install its own supply using a minimum of 4mm twin and earth from the CCU and put a 32Amp double pole isolator and Use a 32Amp MCB or RCBO. Hope this helps
Answered9 February 2022
1
Anonymous user
Upgrade to 32amp fuse and 6 mm cable and this will be safe 100%
Answered9 February 2022
0
S P Electricals
Rating: 5 out of 5
It all depends on the length of the run from your consumer unit to your appliance.
Fused spur can only take 13amps, therefore I would run 4mm or 6mm twin and earth cable from your consumer unit into a isolator and connect the appliance into that isolator.
I will recommend to use a competent person to do the job who can certify for adding a new circuit.
Answered11 February 2022
0
Anonymous user
I=P/V. 5,500/230=23.9 A. That's where the 23.9 A comes from, not the fuse rating. Separate circuit on an appropriate sized fuse (32A probably) wired in an appropriate sized cable (4mm2 probably).
Answered13 February 2022
0