0

My old 4 wire 240V mechanical line voltage thermostat stopped working. I want to replace it with a digital thermostat. Problem is I don't know the amp rating of the old thermostat. I checked with maker and they have no info...too old. Is there a way to check amp rating of old thermostat? A very good electrician installed the two 8 foot baseboard heaters, thermostat, 2-pole 20 amp circuit breaker and all wiring about 25 years but he is nolonger around.

  • Your options of smart stat will be limited. How do you feel about a significantly more complex install, but that will open you up to pretty much all the popular smart 'stats such as Nest? – Harper Sep 26 '18 at 19:21
  • I found the label on the heaters. 2000/1504 amps 240/208V. Based on amp calcs I found online they showed watts/volts=amps. I have two heaters so total watts = 4,000. So 4,000 /240=16.6667. So wouldn't a 16.7 amp stat work? – henrylr Sep 26 '18 at 19:59
  • Can you post photos of the labeling on the old 'stat? – ThreePhaseEel Sep 26 '18 at 23:34
  • That is the problem...the only markings on the old Berko stat are on the bi-metal tab (H00D 36-10) and the manufacturer told me they have no info...to old. – henrylr Sep 27 '18 at 0:12
  • The two heaters - watts 4,000. So 4,000 /240=16.6667. So would a 16.7 amp stat work? – henrylr Sep 27 '18 at 16:02
1

20 amp circuit, so 20 amps (or more, but not less) for the thermostat.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.