RCD protection in a warehouse

[J.C.E]

Is there such thing as a three phase RCBO??!

Needing to install a three phase circuit for a 8kw three phase heater- connection by a 20a comando

I want to use the metal trunking I will be installing for various 13a sockets- so the circuit doesn't need the rcd protection- but i beleive the 20a comando will..

It will be a new hager TPN dis board

so hows best to get fault and additional protection in TP setup?

 

[Andy5678]

Hager do a 3 phase add on block. It joins round the MCB

Worked well for me.

 

[J.C.E]

and with changing the dis board- i am guessing I need to a 4pole SPD even more so with 18th edition out

I will be installed a hager 12way

Technical Properties SPN415D - https://www.hager.co.uk/product-catalogue/energy-distribution/protection-devices/surge-protection/surge-protection-1-2-4-pole/spn415d/91521.htm

where does the spd phycially go?- guessing not inside the dis board as it could do in a single phase consumer unit after the main switch and a 32a MCB

cheers guys

 

[Flanders]

Could you not fit a 20 amp isolator instead and hard wire the heater in , then you would not need the rcd ? Failing that you could get your customer to do a risk assessment and omit the rcd