I recently got a Hobart hsw25 spot welder. It calls for a 250 volt 30 amp receptacle but I can't seem to find it locally. It has 3 pins, 1 normal ground pin and the other to are above it but unlike a 110 volt plug these are vertical. The receptacles I have been finding are the same pattern but to large. The plug on the welder is not much bigger than a normal 110 socket. It maybe a neco 6-30 but its hard to tell on a picture on the internet. Anybody have an idea what I'm looking for? Thank You, jstpa
- Thread starter jstpa
- Start date
You mention that the prongs are vertical.... are you sure the two prongs aren't horizontal, meaning in line with each other. I found some HSW-25 welders on-line and the plugs on them look like a P5-15 110V but instead the two prongs are horizontal.
I looked at the HSW-25 manual on-line but it doesn't define the plug type. The plugs that look the same are only 15A yet it says the welder requires 30A.
If it were me, I would cut the plug off and attach a more common 220V 30A plug and then install a receptacle to match. If you already have a 50A welder receptacle you could even attach a plug to fit that. As long as it is 30A or greater you'll have no problem.
I looked at the HSW-25 manual on-line but it doesn't define the plug type. The plugs that look the same are only 15A yet it says the welder requires 30A.
If it were me, I would cut the plug off and attach a more common 220V 30A plug and then install a receptacle to match. If you already have a 50A welder receptacle you could even attach a plug to fit that. As long as it is 30A or greater you'll have no problem.
dr sportster
Well-known Member
I used to take the plug and push it into cardboard to have a pattern to take to the electrical supply house. They should have a counter chart.
Steve@Advance
Well-known Member
That should be a common receptacle.
Used to see them on window unit AC's.
Used to see them on window unit AC's.
Steve@Advance
Well-known Member
It's possible it does have a 15 amp plug.
Welders are rated at duty cycle, yours is rated at 50%, which would be 15 amps. Look at section 3.
But, then in section 4.5, it calls for a 30 amp service, with #10 wire.
And then in the parts section 8, item 44, the power cord, refers to it being 16ga., back to 15 amps!
There is a big difference in the appearance of a 15 amp and a 30 amp receptacle.
A 15 amp more resembles a common household outlet, while a 30 amp is more like a dryer plug.
Owners manual
Welders are rated at duty cycle, yours is rated at 50%, which would be 15 amps. Look at section 3.
But, then in section 4.5, it calls for a 30 amp service, with #10 wire.
And then in the parts section 8, item 44, the power cord, refers to it being 16ga., back to 15 amps!
There is a big difference in the appearance of a 15 amp and a 30 amp receptacle.
A 15 amp more resembles a common household outlet, while a 30 amp is more like a dryer plug.
Owners manual
Steve@Advance
Well-known Member
Russ from MN
Well-known Member
- Location
- Bemidji MN
That's what I use for small 240v motors, water pumps, radial arms saws, etc.
As a past power distribution design engineer, I would:
1) First compute the "maximum continuous current" NOTE may also take "duty cycle" into consideration
2) Specify the wiring and plugs and receptacles etc to have a minimum ampacity of 125% GREATER THEN the max continuous
current
THEREFORE if the "maximum continuous current" was NO GREATER THEN 24 (80% of 30) AMPS I would use 30 amp rated wiring and
devices.
HOWEVER if it was more then 24 amps I would use higher rated wire and devices.
I cant say how or why Hobart designed the unit, but its awful hard to believe with their engineering and legal departments it would NOT be 100% safe and NEC proper ???????? Max continuous current and duty cycle would be an explanation of the ratings they specified ASK THEM NOT US
John T
1) First compute the "maximum continuous current" NOTE may also take "duty cycle" into consideration
2) Specify the wiring and plugs and receptacles etc to have a minimum ampacity of 125% GREATER THEN the max continuous
current
THEREFORE if the "maximum continuous current" was NO GREATER THEN 24 (80% of 30) AMPS I would use 30 amp rated wiring and
devices.
HOWEVER if it was more then 24 amps I would use higher rated wire and devices.
I cant say how or why Hobart designed the unit, but its awful hard to believe with their engineering and legal departments it would NOT be 100% safe and NEC proper ???????? Max continuous current and duty cycle would be an explanation of the ratings they specified ASK THEM NOT US
John T
buickanddeere
Well-known Member
I am impressed that 347V was covered.
Sam the Man
Member
Who knows why but you need a 6-15. Just don't wire it with anything but #10 wire. The cord certainly does not look like #10.
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