Electric panel heaters..??

sparkyjohn1 · Feb 18, 2014

I recently had another spark ring me up , about a job i completed late last year.Ranting that I havn't installed the heating circuit correctly, and i should re-visit to property to correct it.

The property didn't have a gas supply, so was asked to supply and Install a heating solution. ( electric rads / heaters etc.)

I have included a picture. ##best schematic diagram i could do on microsoft paint.##

This is how i did the job,, please tell me if you can find anything wrong with it..

Only thing i can think of is that the IN-LINE STAT, maybe borderline regarding max current draw,,,rated 16amp. but that is about it.. everything else seems o.k,??

Please let me know if you have any feedback..
thanks

[ElectriciansForums.net] Electric panel heaters..??

Badged01 · Feb 18, 2014

Marvo said:
The MCB in the CU isn't there to protect the devices on the circuit, it's there to protect the circuit itself. The way this is configured the actual supply circuit ends at the point it connects to the thermostat. Surely the supply circuit should end as a point of isolation such as a dp isolator or an FCU?

Correct, and the 40A will adequatley protect the 6mm circuit cable feeding the stat. The debate is around the 40A C/B not protecting the 16A rated stat which it wont on face value. However, the nature of the circuit loading (heaters) is such that the overload current should not exceed 16A -- there or thereabouts! Fault protection should be covered by the RCD and the method of installation reducing its likely hood to a minimum -- setting aside the issue of RCD's failing / what we used to do when I was an apprentice etc.... ( I dont want to get into a debate on RCD's as there are plenty of arguements on other threads ref this!)

As for an isolator/FCU, I dont see any contravention of a reg in not having one for this circuit layout?