Domestic circuit breaker board - welding machine ?

[utterlydiy]

Since change my old domestic fuse board for a Circuit breaker board some 2 years ago I have not used my 140amp Arc welding set.

No problems before, but will the 32amp circuit breakers be OK. Now I want to use it for a repair job.

thanks

 

[AndyPRK]

There is only one way to find out.......

 

[utterlydiy]

OK,

But will the socket ring circuit breaker trip or the RCD breaker first, although I don't use the welding set at full load.

I have a distant memory of when these trip breakers first came about, the circuit breaker in the workshop where I worked had to be changed to a motor rated breaker.

thanks

 

[Taylortwocities]

Please understand this.

An MCB is there to protect the cable against too much current, such as your arc welder could cause if the MCB's trip value is too small.

An RCD is there to protect against a fault to earth.

So, unless your welder has an earth fault that is greater than 30mA, the RCD will never ever trip.

A C or D curve MCB may be necessary, providing the EFLI figure for the circuit is OK.

 

[ban-all-sheds]

//www.diynot.com/wiki/Electrics:MCB2


//www.diynot.com/wiki/Electrics:MCBtoCable

 

[deadshort]

OK,

But will the socket ring circuit breaker trip or the RCD breaker first, although I don't use the welding set at full load.

I have a distant memory of when these trip breakers first came about, the circuit breaker in the workshop where I worked had to be changed to a motor rated breaker.

thanks

Yip, that would be the 'normal' supply used for a welder.

regards,

DS

 

[utterlydiy]

Thanks for your replies.

The circuit breaker was a B32 and presented no problems while welding.

thanks

 

[ban-all-sheds]

No problems so far.

But they might yet materialise.

//www.diynot.com/forums/viewtopic.php?p=3236375#3236375

 

[utterlydiy]

What you are saying, that every Domestic 230v welding machine purchased whether its Arc or Mig from such as Clarke Tooling, Machine Mart and others.

You must get permission. ?

 

[ban-all-sheds]

Yes.

 

[skotl]

The thread that b-a-s linked to would be, in my opinion, the best place to continue the discussion of DNO permission for welders, rather than trying to resurrect it here.

Contrary to that advice, I would contend that 99.9% of home-welder users have not sought permission from their DNO...

 

[jason61c]

Yes.

Rubbish.

 

[bernardgreen]

Yes.( one should seek permission from the DNO )

Rubbish.

When a carpenter moved his work shop from an industrial unit into his domestic garage the start up currents of some of the machinery caused voltage fluctuations in the local network. Neighbours complained to the electricity suppliers. The DNO came out to investigate.

Under threat of disconnection the carpenter had to cease using the larger machines.

 

[jason61c]

Yes.( one should seek permission from the DNO )

Rubbish.

When a carpenter moved his work shop from an industrial unit into his domestic garage the start up currents of some of the machinery caused voltage fluctuations in the local network. Neighbours complained to the electricity suppliers. The DNO came out to investigate.

Under threat of disconnection the carpenter had to cease using the larger machines.

He was running a business from a domestic property.

 

[ban-all-sheds]

The DNO could not have cared less that he was running a business, all they cared about was what he was doing to the supply. If he'd been running a business and not been causing problems they would have left him alone.

If he had been a non-business person with a ceramics hobby who had a large kiln that was causing problems they would have shut him down.

Rubbish.

Did you actually read any of the other topic?