Transformer from socket wire to trickle-charge Ring Doorbell - Is this safe?

shortie · Jun 30, 2021

I have a Ring Doorbell which has no Chime, but which is trickle charged via a wall-mounted BG DIN Rail transformer in a Hagar casing which diverts power from a socket cable. Firstly I have a electric check coming up and I wanted to know if this was safe or is it likely to be picked up in the Electricity Safety check because the transformer is not affixed to a DIN Rail and because in is a BG brand transformer set in a Hagar casing?

westward10 · Jun 30, 2021

Is it connected direct to the socket.

SparkyChick · Jun 30, 2021

I personally wouldn't install such a transformer with an un-fused supply from a socket circuit.

WallaceP · Jun 30, 2021

It should really go from the socket to a fused connection unit then the transformer on the load side of this. So long as the transformer is secure in the enclosure I would say its ok if there is no damage.

In an ideal world the enclosure would have a cover as I don’t know if that transformer is designed to be exposed in such a way but personaly if its in good condition and secure I dont see a problem with the transformer

westward10 · Jun 30, 2021

The transformer and enclosure are not the issue but the fact it is connected direct to the socket with no means of suitable circuit protection.

Mikegh · Jun 30, 2021

That would be the problem

Domestic Socket circuits are designed to supply portable and fixed appliances through a fuse

westward10 · Jun 30, 2021

Mikegh said:
That would be the problem

Domestic Socket circuits are designed to supply portable and fixed appliances through a fuse

"Domestic socket circuit" is not cited in BS7671 this situation is relevant in any setting.

shortie · Jun 30, 2021

westward10 said:
Is it connected direct to the socket.

Yes, the power is coming from the socket wire.

westward10 · Jun 30, 2021

shortie said:
Yes, the power is coming from the socket wire.

Well if the person conducting the EICR actually spots this and it's location does actually indicate the issue without too much investigation then that should attract a Code 2 issue.

Mikegh · Jul 1, 2021

westward10 said:
"Domestic socket circuit" is not cited in BS7671 this situation is relevant in any setting.

I don't know anything about bs7671 btw

Mostly working in continental Europe and US

pc1966 · Jul 1, 2021

A quick search for the CUB1 data sheet shows no specific OCPD requirement.

I would certainly NOT put it on a 32A RFC but have it coming off a FCU with 3A fuse, or off a 6A MCB/RCBO lighting circuit.

shortie · Jul 1, 2021

pc1966 said:
A quick search for the CUB1 data sheet shows no specific OCPD requirement.

I would certainly NOT put it on a 32A RFC but have it coming off a FCU with 3A fuse, or off a 6A MCB/RCBO lighting circuit.

Thank you. I’m grateful for the guidance.