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oxford arc welder

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lordedmond:
to throw a bit of light on the subject


that welder will work from a 13 amp socket provided that socket is on a ring main and fed with a 32 amp fuse,  note the word fuse not a mcb

a 32 amp fuse will take 32 all day and approx. 50amp for about one hour continuous ,  a 13 amp fuse will take approx. 20 for one hour


the point to note here is that a fuse will tolerate an overload for a time but an MCB will trip at just over the rated current , note that some MCB's are rated for transformer inrush ,but these are not normally found in a domestic enviroment

I know that welder will work with fuses as described because I used to own one , has yours got the 2.5 volt heating tappings ( I think they were tagged brazing or something )


From the above please note that MCB will give you better fault protection whereas fuse are not so good , just do the maths  a dead short across a 13 amp fuse  say 0.0001 ohms at 240 volt ( UK ) give an instantaneous current flow of 240 /0.0001 = 2,400,000 amps    think about it


Stuart

SemiSkilled:
A  C type breaker will give you different tripping characteristics, they'll take inrush current better than a B type the only thing is to meet the reg's the loop impedance for the c type is a lot lower ie you'll need a good earth.

You may be able to test for this, a loop tester just plugs in push a button but youll need the loop tester

Easiest way out is a 32A RCBO a 32A mcb and an RCD in one device

http://www.google.co.uk/products/catalog?hl=en&xhr=t&q=32A+rcbo+c+type&cp=15&um=1&ie=UTF-8&cid=15305687735072198038&sa=X&ei=0gNoTZjrBsaWhQeJhYjtDg&sqi=2&ved=0CDYQ8wIwAg#

Lee

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