424.20 Thermostats
What changed in 424.20
A thermostat used as the disconnect must be accessible.
Point by point
- A thermostat or thermostatically controlled switch used as both controller and disconnect now has to be in an accessible location.
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- One more point on exactly what changed
- The 2017 rule next to the 2020 rule, side by side
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This section across NEC® editions
2020 NEC®RevisedYou're here
A thermostat used as the disconnect must be accessible.
2023 NEC®No change
This section did not change from 2020 to 2023.
2026 NEC®No change
This section did not change from 2023 to 2026.
This is a plain-English summary, not the NEC®'s exact wording. Always check the full section in the NEC® edition your area has adopted, plus any local amendments.
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