Cast Iron Service head???

[Electricalserv]

Went to a job today. Upon opening cupboard to service head. I am faced with what can only be described as a cast iron service head. Never seen one like this before!


Its of a large square shape with tails coming out the top. No sign of fuse. Disn't investigate if there was any way to open it.


My question is what the score with these can a board be changed or does the DNO need to upgrade it. Ze was 0.13ohms. It loos likle a tn-s


Anyone come across these?

 

[netblindpaul]

Guys you are committing a criminal offence if you tamper with this kit, not only that it is damn dangerous.
Get the DNO to sort it, tell them it smells or is hot to the touch and you are afraid it is going to catch fire, that way they have to make it an emergency call out, you should have it changed out in a couple of hours FOC.
It's their kit, they can't charge you for maintaining it.
They can charge you in a criminal law way for tampering with it though.

 

[Short Circuit]

Is this the same type on this pic? I came across this last week and low and behold the seals had already been broken (!) Inside were three 150 a fuses / Cant think of the type off the top off my head but they were the ones with the hooks on either end. Apparently they are from the 60's and the DNO hate changing them! Something to do with the fact they are hard work to do and the cables generally fall to bits when they break all the tar off them! Strangely enough, i hadnt realised intil i looked that this photo it actually has 3 x 150 written on it - D'Oh!

 

[Short Circuit]

forgot to mention - they are lethal when they are open and the fuses are disconnected as the main supply is open and far to easy to be touched !

 

[Electricalserv]

View attachment 6159

Definately the most similar so far! Infact thats in much better condition!

 

[Electricalserv]

Last rewire was done in 1990's apparently. All seals are manweb tagged. Do you think the fuses may have been rectified then?

 

[Short Circuit]

The main thing i wasn't too keen on was the bakelite cover on the top - although saying that it was secure, apart from rattling about a bit.

 

[Electricalserv]

Short thanks for the heads up there. Il look for the fuse ratings on the case and then bypass the DNO if I can get away with it. What fuse type were they?

 

[Short Circuit]

Last rewire was done in 1990's apparently. All seals are manweb tagged. Do you think the fuses may have been rectified then?

I would very much doubt it - seems like a call to the DNO will be the option to go for and get them to sort it for you! Really, they shouldnt charge for it as like someone said earlier, its well past its serviceable life and should be ditched! Its their equipment, make them change it!

 

[Short Circuit]

J Type Hooks on either end - similar to these - J type Bolt Connected Fuse Link - Tirh Technology Co., Ltd. Zhejiang
Providing the link works!

 

[electromonkey]

Soory about the poor pic!View attachment 6155

Amazing picture Electricalserv. What camera did you use? lol.

 

[Electricalserv]

Right lads, went back today. Tried to open it and ceramic heads just cracked as I tried to wedge it. Even if the DNO came out the ceramics would just shatter. Its a very mad caseing.


On front it says 250v and 30 amps? how strange. Anyone know why. Inside it looks like there is 3 ceramic cylinders (seen through small gap when wedged). The door lifts off. But as you lift up the ceramics just crack. Nightmare.

 

[Jimmyb]

I would very much doubt it - seems like a call to the DNO will be the option to go for and get them to sort it for you! Really, they shouldnt charge for it as like someone said earlier, its well past its serviceable life and should be ditched! Its their equipment, make them change it!

I had same thing DNO changed for free as the case is metal and is not allowed any more so nice new service head and tncs so was well happy :coolgleamA:

 

[Knobhead]

forgot to mention - they are lethal when they are open and the fuses are disconnected as the main supply is open and far to easy to be touched !

Wimp ! ! ! !
Nothing wrong with those fuses. The first DB I installed was fed off them! 550V 3Ph.

 

[nikmet]

Right lads, went back today. Tried to open it and ceramic heads just cracked as I tried to wedge it. Even if the DNO came out the ceramics would just shatter. Its a very mad caseing.


On front it says 250v and 30 amps? how strange. Anyone know why. Inside it looks like there is 3 ceramic cylinders (seen through small gap when wedged). The door lifts off. But as you lift up the ceramics just crack. Nightmare.

Why are you trying to open it? Do the right thing and call the DNO.