Originally Posted By: dkeogh
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Originally Posted By: phinsperger
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Looks like they are using a DPST switch when they should be using a DPDT switch.
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Paul Hinsperger
Hinsperger Inspection Services
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Originally Posted By: mtimpani
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Thank you, MarkTimpani
www.pridepropertyinspections.com
Originally Posted By: phinsperger
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DPST = Double Pole, Single Throw
DPDT = Double Pole, Double Throw
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Paul Hinsperger
Hinsperger Inspection Services
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Originally Posted By: bking
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replace the word position with pole and it would be more correct.
Originally Posted By: phinsperger
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Paul Hinsperger
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Originally Posted By: rcooke
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The reason they have done this is too make sure only ONE piece of equipment operates at one time .
They might not have spare breakers or a large enough service .
I agree if this is going to be done you must have a DPDT switch to make sure there is no power to the other equipment .
The heater only getting warm sounds to me like either it is now operating on 120 volts instead of 240 volts, or the two heaters are now in series with each other.
Either way a 240 volt heater operating on 120 volts or in series ( IF THEY ARE BOTH THE SAME WATTAGE) only puts out 25% of its normal heat.
That could explain why the heater was only getting warm.
I am not sure of the legality of this arrangement.
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Roy Cooke Sr.
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Originally Posted By: dkeogh
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Thank you all for your help
Originally Posted By: bbadger
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| rcooke wrote: |
| I agree if this is going to be done you must have a DPDT switch to make sure there is no power to the other equipment .
|
FWIW the NEC would not require a double pole switch for this.
The switch would be a controller not a disconnect, controllers do not have to break all poles.
It is common to use a single pole thermostat (another type of controller) with 240 volt baseboard.
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Bob Badger
Electrical Construction & Maintenance
Moderator at ECN
Originally Posted By: rcooke
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| bbadger wrote: | ||
FWIW the NEC would not require a double pole switch for this. The switch would be a controller not a disconnect, controllers do not have to break all poles. It is common to use a single pole thermostat (another type of controller) with 240 volt baseboard. |
I know that they use singe poles for some electric heaters . In this case they are also trying to feed an AC from the same circuit . I do not like it but if I was doing it I would want to isolate the Heater from the circuit.
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Roy Cooke Sr.
http://Royshomeinspection.com
Originally Posted By: bbadger
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| rcooke wrote: |
| I do not like it but if I was doing it I would want to isolate the Heater from the circuit. |
Well something is certainly odd with the lukewarm baseboards.
This could be done correctly, without lukewarm heaters even with a single pole switch.
That said, I do agree with you that if I was assigned this problem I would automatically think DPDT.
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Bob Badger
Electrical Construction & Maintenance
Moderator at ECN