A 2 pole 240 volt Throw switch feeding a 3phase 208 panel.

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Mailcall25

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Location
florida
Occupation
Electrician
Good day


I have a 240 volt throw switch, in the throw switch it has 4 terminals separated 2x2 on the line side for X1 and X2 only feeding a 208 3 phase panel. So basically, X1 is on one side by itself, and X2, and X3 are one side is it possible for this to overheat conductors, and those conductors are 1/0 .
 
I think he means a knife switch with double lugs on the load side. If that's the case then I think he means A-phase on one side of the 240V and B and C phases on the other side of the 240V. I can't think of a violations, but it's screwy enough that I could be missing something. If it is legal, then the conductors won't overheat, but the total load of B/C phases will be applied to the OCPD.

Mark
 
Mailcall25 said:
Good day


I have a 240 volt throw switch, in the throw switch it has 4 terminals separated 2x2 on the line side for X1 and X2 only feeding a 208 3 phase panel. So basically, X1 is on one side by itself, and X2, and X3 are one side is it possible for this to overheat conductors, and those conductors are 1/0 .
Click to expand...
🤔
So you're saying two conductors are paralleled?
 
busman said:
I think he means a knife switch with double lugs on the load side. If that's the case then I think he means A-phase on one side of the 240V and B and C phases on the other side of the 240V. I can't think of a violations, but it's screwy enough that I could be missing something. If it is legal, then the conductors won't overheat, but the total load of B/C phases will be applied to the OCPD.

Mark
Click to expand...
I'm guessing a knife switch as well, but your explanation didn't help me either.
The other side of what?
"A" in the left hand hole of the double lug, with "B" and "C" in the right hand hole of the respective lug?
 
Hv&Lv said:
🤔
So you're saying two conductors are paralleled?
Click to expand...
If I’m reading it right, two of the panel buss’s are paralleled, so one phase is hypothetically 42 space, the other phase is 82 space. If the ocp is correct, it’s not going to overheat, but does have a potential of being very unbalanced. (They are feeding a three phase panel with single phase power)
 
busman said:
I think he means a knife switch with double lugs on the
hillbilly1 said:
If I’m reading it right, two of the panel buss’s are paralleled, so one phase is hypothetically 42 space, the other phase is 82 space. If the ocp is correct, it’s not going to overheat, but does have a potential of being very unbalanced. (They are feeding a three phase panel with single phase power)
Click to expand...
load side. If that's the case then I think he means A-phase on one side of the 240V and B and C phases on the other side of the 240V. I can't think of a violations, but it's screwy enough that I could be missing something. If it is legal, then the conductors won't overheat, but the total load of B/C phases will be applied to the OCPD.

Mark
Click to expand...
Yes
ptonsparky said:
Picture? I know you know what you said is clear, but I missed something.

A listed product from any of the manufacturers will not increase or decrease the chance of overheating when properly installed and applied.
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hillbilly1 said:
If I’m reading it right, two of the panel buss’s are paralleled, so one phase is hypothetically 42 space, the other phase is 82 space. If the ocp is correct, it’s not going to overheat, but does have a potential of being very unbalanced. (They are feeding a three phase panel with single phase power)
Click to expand...
they are feeding a 208 3 phase disconnect for a condenser
 
busman said:
I think he means a knife switch with double lugs on the load side. If that's the case then I think he means A-phase on one side of the 240V and B and C phases on the other side of the 240V. I can't think of a violations, but it's screwy enough that I could be missing something. If it is legal, then the conductors won't overheat, but the total load of B/C phases will be applied to the OCPD.

MarkThanks
Click to expand...
 
Mailcall25 said:
Good day


I have a 240 volt throw switch, in the throw switch it has 4 terminals separated 2x2 on the line side for X1 and X2 only feeding a 208 3 phase panel. So basically, X1 is on one side by itself, and X2, and X3 are one side is it possible for this to overheat conductors, and those conductors are 1/0 .
Click to expand...

busman said:
I think he means a knife switch with double lugs on the load side. If that's the case then I think he means A-phase on one side of the 240V and B and C phases on the other side of the 240V. I can't think of a violations, but it's screwy enough that I could be missing something. If it is legal, then the conductors won't overheat, but the total load of B/C phases will be applied to the OCPD.

Mark
Click to expand...
Mailcall25 said:
Good day


I have a 240 volt throw switch, in the throw switch it has 4 terminals separated 2x2 on the line side for X1 and X2 only feeding a 208 3 phase panel. So basically, X1 is on one side by itself, and X2, and X3 are one side is it possible for this to overheat conductors, and those conductors are 1/0 .
Click to expand...
 

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busman said:
I think he means a knife switch with double lugs on the load side. If that's the case then I think he means A-phase on one side of the 240V and B and C phases on the other side of the 240V. I can't think of a violations, but it's screwy enough that I could be missing something. If it is legal, then the conductors won't overheat, but the total load of B/C phases will be applied to the OCPD.

Mark
Click to expand...
i unloaded pictures, and i took thermals and it has spots
 
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