R
robsparx
I recently picked up a job to install some power and lighting in a new small shed/workshop being built in somebody's garden.
When asking about what was going in there, the builder told me it would just be a couple of small power tools, but on further investigation the customer wants to use an arc welder out there!
I've never installed a supply for anything like this before, and am a bit unsure of the cable size etc i will need to use. In the specs in the instructions for it it says:
"mains outlet maximum duty cycle = 35A"
"recommended fuse size maximum duty cycle = 70A"
"maximum input current = 48A"
Am i right in assuming that i need to install some kind of 70A switch fuse at the mains, which would then feed an isolator and 35A commando socket to connect onto the welder?
And for the cable size, would it have to be rated at the "recommended fuse size" of 70A, or the "maximum input current" of 48A? I would go for 70A to be on the safe side, but not sure if it would need to be rated so high because after startup, it wouldnt be using so much current.
And to throw a spanner in the works, in the specs in the manual it says the mains supply lead size is 4mm, and the mains outlet size for that should be 35A. I have looked at the lead and it looks like a 4mm, but has a label on it saying that the lead is rated for 16A????
Anyone done this before??
edit: the welder is a 'thermal arc fabricator 250'
When asking about what was going in there, the builder told me it would just be a couple of small power tools, but on further investigation the customer wants to use an arc welder out there!
I've never installed a supply for anything like this before, and am a bit unsure of the cable size etc i will need to use. In the specs in the instructions for it it says:
"mains outlet maximum duty cycle = 35A"
"recommended fuse size maximum duty cycle = 70A"
"maximum input current = 48A"
Am i right in assuming that i need to install some kind of 70A switch fuse at the mains, which would then feed an isolator and 35A commando socket to connect onto the welder?
And for the cable size, would it have to be rated at the "recommended fuse size" of 70A, or the "maximum input current" of 48A? I would go for 70A to be on the safe side, but not sure if it would need to be rated so high because after startup, it wouldnt be using so much current.
And to throw a spanner in the works, in the specs in the manual it says the mains supply lead size is 4mm, and the mains outlet size for that should be 35A. I have looked at the lead and it looks like a 4mm, but has a label on it saying that the lead is rated for 16A????
Anyone done this before??
edit: the welder is a 'thermal arc fabricator 250'
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