gsstaley@sbcglobal.net
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Is there a concern with using type 1 SPDs without violating 110.14A? Are there terminal expanders that are acceptable without compromising the listing of the main lug?
Type 1 SPDs
- Thread starter gsstaley@sbcglobal.net
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- Bremerton, Washington
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- Master Electrician
Not that I have seen. Perhaps a polaris tap? However, does the SPD require OCPD?
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gsstaley@sbcglobal.net
Member
- Location
- Houston
Type 1 can be installed on the line side, but I'm wondering about a small wire from the SPD and a 4/0 alum being under the same lug of a breaker. Wouldn't the lug need to be listed for 2 wires?
They need to be identified for such use. 2020 NEC 110.14(A)
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