What is the BS number is for this old DNO Crabtree enclosure?

[Too_Wired]

Hi,

I completed an EICR at a customer home in the week and came across this old Crabtree DNO equipment in the meter cupboard. Just two questions really

1. Does anyone know what the BS number of this equipment is (See pictures)
2. Will the DNO replace it if the customer requests an isolator switch fitted? (I'm quoting the customer on a new CCU) I ask because I've heard these old incoming DNO supply enclosures are not to be messed with, at all.

Thank you in advance

 

[partplonker]

Wouldn't the BS number be for the fuse inside it rather than the enclosure itself? Would guess 1361 (now BS88-3) but you'd have to open it to look at the fuse. It's a fine looking antique isn't it?

 

[westward10]

Under no circumstances open it. It may well predate a British Standard and there is every chance it contains BS3036 semi-enclosed fuses, when I say fuses it may well have one through the neutral. It will almost certainly be replaced.

 

[James]

That also looks like a DIY earth connection.

 

[partplonker]

Is it wrong that I really want to see what's inside it? Could it really be 3036 fuse wire? Maybe a lovely bit of asbestos? Could there be a fused neutral? I find old gear fascinating.

Those tails coming out of it look like PVC so they've been updated at some point.

 

[westward10]

You have no idea what is going on inside that enclosure just opening the cover could cause a disturbance, it doesn't take much for something catastrophic to happen.

 

[partplonker]

You have no idea what is going on inside that enclosure just opening the cover could cause a disturbance, it doesn't take much for something catastrophic to happen.

I know, that's why the DNO guys have those heat jackets, gloves and the face shields in case the whole thing falls apart. Just curious, that's all

 

[Too_Wired]

I know, that's why the DNO guys have those heat jackets, gloves and the face shields in case the whole thing falls apart. Just curious, that's all

I asked because I have no intention of opening it regardless of curiosity... just wondered if you'd come across them before. Also, there's tar leaking from the enclosure so I've requested the house holder contact their DNO to get it assessed ASAP.

 

[ipf]

Can't see it being anything other than 3036 with fused neutral, although tails replaced (within the last 40 or 50 years).
Definitely a case for DNO. They will change it and renew the main earth connection. Better be quick though, before it topples off the wall.

Better off if you contact DNO and explain the situation fully.

 

[Too_Wired]

Under no circumstances open it. It may well predate a British Standard and there is every chance it contains BS3036 semi-enclosed fuses, when I say fuses it may well have one through the neutral. It will almost certainly be replaced.

Thanks for the feedback, I've heard similar things about these being a pandora's box of unpleasantires!