Question about Connecticut Electric 40 Amp 2 Pole Circuit Breaker

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I want to put a on and off switch just like a light switch in the wiring for my compressor. It has a 40 amp breaker and is a 220 volt compressor. I have a 30 amp, 600 volt switch and I need to know if this is correct or do I need to use a 40 amp switch. Thanks

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  • 6456trucks Feb 26, 2009

    Well I looked on my compressor and all it says is 208-230 volt, 1 phase. I do know that it has a 40 amp double pole breaker and all I want to do is put a switch in so I don't have to keep unplugging my compressor just in case a line blows or something that would allow it to run all the time. Thanks

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On the compressor or in the manual it should say the Full Load Current or Full Line Current (FLC). I would go by that to size your switch.

They make motor rated toggle switches which look the same as a light switch. You would need a *blank* amp motor rated 2 pole toggle switch it should have 2 screws on each side excluding the ground. The left side screws should have one circuit on them and the right side should have the other circuit on them. Mount this in a metal box with a "RS switch cover" for inside installs or a "Bell" or ferrous box for outside with a weatherproof switch cover. Make sure you buy a big enough box to fit the switch and room to bend the wires. Also are you planning on just cutting a cord and running to the switch or hard wiring? Make sure to get appropriate connectors and if it is exposed to possible damage consider using flexible mettalic conduit.

FYI in most cases a switch can not be oversized it can be undersized however.

Feel free to write back if this is unclear.

Posted on Mar 31, 2009

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NO U SHOULD NOT USE THE 30 AMP. SW, THE SW SHOULD BE THE SAME SIZE AS THE PROTECTION AT THE PNL! AND THEY SHOULD BOTH BE THE SIZE THAT IS STATED ON THE NAME PLATE ON YOUR COMPRESSOR, U CAN USE A 220 VOLT SINGLE PHASE NONE FUSED 60 AMP INDOOR OR OUTDOOR TYPE DISCONNECT FOUND AT ANY ELECTRICAL SUPPLY HOUSE, AROUND $20-30 IF I HAVENT BEEN UNDER AROCK FOR LONG! THIS BY THE WAY IS NOT TO BE MOVABLE, SWITCH NEEDS TO BE MOUNTED TO SOMETHING LIKE A WALL OR COLUMN. GOOD LUCK AND BE CAREFUL WITH THE JUICE!

Posted on Feb 26, 2009

  • im4wideop277 Feb 26, 2009

    NO U SHOULD NOT USE THE 30 AMP. SW, THE SW SHOULD BE THE SAME SIZE AS THE PROTECTION AT THE PNL! AND THEY SHOULD BOTH BE THE SIZE THAT IS STATED ON THE NAME PLATE ON YOUR COMPRESSOR, U CAN USE A 220 VOLT SINGLE PHASE NONE FUSED 60 AMP INDOOR OR OUTDOOR TYPE DISCONNECT FOUND AT ANY ELECTRICAL SUPPLY HOUSE, AROUND $20-30 IF I HAVENT BEEN UNDER AROCK FOR LONG! THIS BY THE WAY IS NOT TO BE MOVABLE, SWITCH NEEDS TO BE MOUNTED TO SOMETHING LIKE A WALL OR COLUMN. GOOD LUCK AND BE CAREFUL WITH THE JUICE!

  • im4wideop277 Feb 26, 2009

    NO U SHOULD NOT USE THE 30 AMP. SW, THE SW SHOULD BE THE SAME SIZE AS THE PROTECTION AT THE PNL! AND THEY SHOULD BOTH BE THE SIZE THAT IS STATED ON THE NAME PLATE ON YOUR COMPRESSOR, U CAN USE A 220 VOLT SINGLE PHASE NONE FUSED 60 AMP INDOOR OR OUTDOOR TYPE DISCONNECT FOUND AT ANY ELECTRICAL SUPPLY HOUSE, AROUND $20-30 IF I HAVENT BEEN UNDER AROCK FOR LONG! THIS BY THE WAY IS NOT TO BE MOVABLE, SWITCH NEEDS TO BE MOUNTED TO SOMETHING LIKE A WALL OR COLUMN. GOOD LUCK AND BE CAREFUL WITH THE JUICE!

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