110.14 Electrical connections
What changed in 110.14
Terminals now have to be torqued to the marked value by an approved method, and copper touching copper-clad aluminum no longer counts as a dissimilar-metal mix.
Point by point
- Terminals must be tightened to the torque value marked on the equipment or given in the manufacturer's instructions.
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Get the whole breakdown
- 4 more points on exactly what changed
- The 2017 rule next to the 2020 rule, side by side
- Why it changed
- What to do and check on the job
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This section across NEC® editions
2020 NEC®RevisedYou're here
Terminals now have to be torqued to the marked value by an approved method, and copper touching copper-clad aluminum no longer counts as a dissimilar-metal mix.
2023 NEC®Revised
The example metal pairs were removed from the dissimilar metals rule. Different metals still can't touch in a terminal or splice unless the connector is made and identified for that.
Open the 2023 page →2026 NEC®Revised
Wording tightened: soldering lugs are now named, and solder, flux, inhibitors and compounds have to be identified for the use instead of just suitable.
Open the 2026 page →More 2020 changes in Article 110
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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