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Electrical

Fused Spur for cylinder immersion heater

Anonymous user 23/02/2024 - 3.20 PM

Hi folks. I have to replace my unvented water cylinder and the current one doesn't have a backup immersion heater for some reason. I've been told that to get one installed I'd need to run a fused spur directly from the consumer unit. Is that required by the regs, or simply best practice? If the latter, could I get away with provisioning it another way to avoid significant disruption? (Not planning on doing any of this myself, just trying to get an idea of the impact involved!). Thanks, Craig

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3 Answers

Anonymous user

Hi Craig, in a ideal world a new circuit from the consumer unit would be the best way. However you can also come of the exisiting ring main in the property to a switch fuse spur to fuse it down to 13a and will be more than capable of running a immersion.
Answered25 November 2018
3

Sunday Electrical Ltd

Rating: 4.7 out of 5
Bristol
As a boiler, cylinder or immersion heater are fixed load appliances and an essential service, the regs require it to have its own separate radial circuit, protected by its own rated trip. This is run to a fused spur unit which can be switched or a double pole switch of appropriate rating. A heat rated flex should be used for the final connection. A new circuit should be installed and tested in accordance with BS7671 and Part P Building regs by a competent person.
Answered26 November 2018
2

BZ Electrical

Rating: 5 out of 5
Borehamwood
Based on latest electrical regulation require it to have its own separate circuit, Because immersion heater takes a lots of current and amp also this circuit must be protected by its own rated trip. A heat rated flex should be used for the final connection. A new circuit should be installed and tested in accordance with BS7671 and Part P Building regs by a competent person.
Answered26 November 2018
2