Earth continuity/testing - one for Murdoch?

[Aquarius]

Thought I’d divert from hijacking the other thread 😁

I quite often fit class 2 wireless thermostats, sometimes battery thermostats (so just live and switched), and often Honeywell T6360 thermostats.

Questions if I may? (Can’t remember if I’ve asked on here before)

On the class 2 wireless thermostats, which usually take their load from the boiler or a fcu, do I still need to provide the cpc if it’s not connected at either end? I’m told from our electrician’s that I’m to provide the cpc, but leave the it not connected, but so it can be checked?

On the battery thermostats - not sure how I maintain the earth continuity? I presume this is connected elsewhere?

On the Honeywell’s I park the cpc, which is fine. If I’m replacing like for like, do i need to do any testing? The reason being, when I replace a pcb, I usually check the earth loop using my Martindale ez650.

Many thanks.

 

[Murdoch]

On the class 2 wireless thermostats, which usually take their load from the boiler or a fcu, do I still need to provide the cpc if it’s not connected at either end? I’m told from our electrician’s that I’m to provide the cpc, but leave the it not connected, but so it can be checked?

The CPC should be connected at the FCU or boiler. It is NOT acceptable to use a cable without a CPC when 230v is connected

On the battery thermostats - not sure how I maintain the earth continuity? I presume this is connected elsewhere?

On the Honeywell’s I park the cpc, which is fine. If I’m replacing like for like, do i need to do any testing? The reason being, when I replace a pcb, I usually check the earth loop using my Martindale ez650.

Many thanks.

A battery thermostat is powered by a battery so a CPC is irrelevant, but on the main powered RF part the CPC should be connected to the source

 

[Aquarius]

Thanks, but I’m confused, if the battery stat (uses 2 wires) uses 230vac switching, surely a cpc is needed?

On the cpc connected to fcu or boiler, for an rf receiver, do I just terminate the other end in a chock block or wago?

Also on the Honeywell 230vac, I connect the cpc which is already there, do I need to do any testing?

 

[Murdoch]

Thanks, but I’m confused, if the battery stat (uses 2 wires) uses 230vac switching, surely a cpc is needed?

On the cpc connected to fcu or boiler, for an rf receiver, do I just terminate the other end in a chock block or wago?

Also on the Honeywell 230vac, I connect the cpc which is already there, do I need to do any testing?

my bad - when I read battery stat, I thought you meant a battery RF stat!

So yes a cable with PL and Sl should always have a CPC connected to the supply end