120/240 vac

[codequestion]

I have 120/240 vac single phase incoming and downstream of that safety switch provided is 480V, 3 pole. Per code is that ok to use or need 2 pole 240V safety switch?

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[kwired]

I have 120/240 vac single phase incoming and downstream of that safety switch provided is 480V, 3 pole. Per code is that ok to use or need 2 pole 240V safety switch?

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You are using a switch rated for 480 volts on a circuit that is 120/240 volts? If so that is ok, you haven't exceeded volt rating of the switch.

BTW "safety switches" typically are either 240 volt rated or 600 volt rated.

 

[codequestion]

Ha...didnt find 480v online. Its non fuses safety switch (nfss) and three pole. Then it has to be 240vac since ob 130/240v circuit single phase. 3 pole acceptable?.

You are using a switch rated for 480 volts on a circuit that is 120/240 volts? If so that is ok, you haven't exceeded volt rating of the switch.

BTW "safety switches" typically are either 240 volt rated or 600 volt rated.

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[kwired]

Ha...didnt find 480v online. Its non fuses safety switch (nfss) and three pole. Then it has to be 240vac since ob 130/240v circuit single phase. 3 pole acceptable?.

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It is likely 600 volt rated (maybe only 250 volts DC) - nothing wrong with using it on less then 600 volts. Nothing wrong with only using just one pole or two poles either if that is all your application requires.

 

[jap]

Ha...didnt find 480v online. Its non fuses safety switch (nfss) and three pole. Then it has to be 240vac since ob 130/240v circuit single phase. 3 pole acceptable?.

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Do you intentionally try to confuse us with your questions? or does it just come naturally?....


JAP>

 

[jap]

Just kidding with you.

Seriously though, for some manufacturers as soon as you select "Heavy Duty" and "Non Fused with or without Neutral" it automatically defaults to a 600v rated safety switch.


JAP>

 

[kwired]

Just kidding with you.

Seriously though, for some manufacturers as soon as you select "Heavy Duty" and "Non Fused with or without Neutral" it automatically defaults to a 600v rated safety switch.


JAP>

And even if the have a catalog number for a two pole unit, it is same thing as three pole unit with parts missing out of one pole. Supply house possibly only stocks the three pole and a two pole would be special order and possibly cost more anyway.

 

[jap]

And even if the have a catalog number for a two pole unit, it is same thing as three pole unit with parts missing out of one pole. Supply house possibly only stocks the three pole and a two pole would be special order and possibly cost more anyway.

True.

And, when comparing a general duty disconnect and a heavy duty disconnect although the name sounds appealing, there's really not a ton of difference in them other than the arc chutes and possible the finger safe shields.


JAP>

 

[kwired]

True.

And, when comparing a general duty disconnect and a heavy duty disconnect although the name sounds appealing, there's really not a ton of difference in them other than the arc chutes and possible the finger safe shields.


JAP>

I've seen general duty that don't appear to have as robust of contact components as HD. Also seen general duty that don't have a cover interlock but HD always do.

 

[jap]

I've seen general duty that don't appear to have as robust of contact components as HD. Also seen general duty that don't have a cover interlock but HD always do.

Oh,,, I forgot,,,,, your a Sq. D guy...


JAP>

 

[kwired]

Oh,,, I forgot,,,,, your a Sq. D guy...


JAP>

Once saw a Square D general duty 200 amp switch - contacts/blades or whatever you want to call them were similar design to those in about every GE switch I can recall seeing (not sure if the GE was general or HD though)

 

[norcal]

Once saw a Square D general duty 200 amp switch - contacts/blades or whatever you want to call them were similar design to those in about every GE switch I can recall seeing (not sure if the GE was general or HD though)

The current designs of Siemens & Cutler-Hammer safety switches also are copies of GE , still remember a comment made to me years ago, "If you want a switch to burn up, use GE." , their design does lend it's self to overheating, one loose screw in the plastic base & they cook.

 

[kwired]

The current designs of Siemens & Cutler-Hammer safety switches also are copies of GE , still remember a comment made to me years ago, "If you want a switch to burn up, use GE." , their design does lend it's self to overheating, one loose screw in the plastic base & they cook.

Maybe I should ask if Square D is the only one that has a general duty and a heavy duty line of switches?

Nearly all others I have seen seem to be lighter duty then Square D's heavy duty switches.