3 phase electric boiler

[telectrix]

Customer has seen this on ebay, wants me to adsvise and then, if bought, install it. not done anything with electric boilers so looking for confirmation that 6.0mm 4 core on a 40A MCB, ref. method C, is about right. I calculate 33A per phase as the load. any thoughts?
ELECTRIC HEATING BOILER ELTERM "LIEUTENANT" 3 PHASES 24kW+ Digital Thermostat | eBay - https://www.ebay.co.uk/itm/ELECTRIC-HEATING-BOILER-ELTERM-LIEUTENANT-3-PHASES-24kW-Digital-Thermostat/301997800155?epid=1476045497&hash=item465078badb:g:dmQAAOSw5dlZ-kr~

 

[Pete999]

Customer has seen this on ebay, wants me to adsvise and then, if bought, install it. not done anything with electric boilers so looking for confirmation that 6.0mm 4 core on a 40A MCB, ref. method C, is about right. I calculate 33A per phase as the load. any thoughts?
ELECTRIC HEATING BOILER ELTERM "LIEUTENANT" 3 PHASES 24kW+ Digital Thermostat | eBay - https://www.ebay.co.uk/itm/ELECTRIC-HEATING-BOILER-ELTERM-LIEUTENANT-3-PHASES-24kW-Digital-Thermostat/301997800155?epid=1476045497&hash=item465078badb:g:dmQAAOSw5dlZ-kr~

34.6Amps using 400volts Tel 33.4Amps using 415volts, just a n odd questionTel are the boilers TP&N or just TP as I have worked on boilers that only require TP no Neutral required as the elements were rate at 415volts.

 

[telectrix]

bit in the real world we have 415V. suppose it depends on what voltage the manu. has used to calc. the kW.

 

[Leesparkykent]

How big is the property? That's going to be juicy.

 

[telectrix]

it's only a (upstairs) 2 bed flat. but cust. may want to add radiators in the ground floor at a later date. better too big that too small, i reckon.

 

[Toneyz]

it's only a (upstairs) 2 bed flat. but cust. may want to add radiators in the ground floor at a later date. better too big that too small, i reckon.

How come a three-phase supply for a flat?

 

[telectrix]

it's combined premises. the ground floor needs 3 phase for machinery, and it was cost effective to run all 3 phases to upstairs flat, esp. considering that a single phase electric boiler would pull close to the limit of the supply fuse.

 

[Toneyz]

it's combined premises. the ground floor needs 3 phase for machinery, and it was cost effective to run all 3 phases to upstairs flat, esp. considering that a single phase electric boiler would pull close to the limit of the supply fuse.

I thought it was, that's going to cost a lot to run, isn't it?Are they going to check the property is well insulated from heat loss?

 

[telectrix]

it's new build, so loads of kingspan in every cavity. thing is, with a boiler this size, heat is generated faster so it's using for less time. same as a 3kW kettle draws more current than a 2kW kettle, but takes less time. cost to heat the water is the same. Kw x t.

 

[Toneyz]

it's new build, so loads of kingspan in every cavity. thing is, with a boiler this size, heat is generated faster so it's using for less time. same as a 3kW kettle draws more current than a 2kW kettle, but takes less time. cost to heat the water is the same. Kw x t.

Whenever I have been to properties with electric heating they have always moaned about the cost to use. Are you doing the whole installation Tel?

 

[telectrix]

yep. at the moment there's just a 3 way "garage CU" supplying a double socket for power tools etc. and a 16mm 4 core from suppliers isolator ready to feed 3 phase DB. I'm in there Monday to 1st fix.

 

[Toneyz]

yep. at the moment there's just a 3 way "garage CU" supplying a double socket for power tools etc. and a 16mm 4 core from suppliers isolator ready to feed 3 phase DB. I'm in there Monday to 1st fix.

Sounds a good little job Tel.

 

[Squid]

Whenever I have been to properties with electric heating they have always moaned about the cost to use. Are you doing the whole installation Tel?

The ones I have visited are usually cold with a portable heater in one room as they can't afford to heat the whole house. I need better situated friends than council house dwellers in Liverpool.......

 

[Leesparkykent]

We done a block of flats, new build with wet system and electric boiler. Each flat had one of these installed. Seemed to do the job well. Heatrae Sadia Electromax Electric Flow Boilers | Electric Boilers - https://www.plumbnation.co.uk/site/heatrae-sadia-electromax-electric-flow-boilers/?gclid=EAIaIQobChMIp6zzgPS-2QIVw7gbCh3bwgGZEAkYDiABEgJuNvD_BwE