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Solid to Stranded?

PJorgen

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Joined
Oct 27, 2020
Messages
42
Location
Reno, NV
Is it OK to connect solid wire, like NM-B, to stranded, like thhn, using wire nuts? Assuming same gauge. Any tricks, twist the stranded around the solid?

If it’s not allowed, how should it be done?
 
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dscheidt

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Apr 26, 2017
Messages
2,888
YES, you can splice stranded to solid wire as long as it is the same gauge………. I suggest using WAGO connectors but wire nuts also would work.

The UL listed combinations for most of Ideal's wire nuts have no such restriction about same gauge. It's perfectly acceptable to connect a smaller stranded wire (as you might find inside a listed luminaire) to a larger solid wire or vice versa, assuming the combination is suitable for the connector.

In general, when joining stranded to solid, strip the stranded wire a little longer and lead it ahead of the solid wire. I usually pretwist for these, and then put the nut on after I"m sure the wires are actually twisted together solidly.[/QUOTE]
 

wyliesdiesels

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Aug 14, 2012
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Location
Modesto, CA
YES, you can splice stranded to solid wire as long as it is the same gauge………. I suggest using WAGO connectors but wire nuts also would work.
no such requirement as long as the breaker or overcurrent protection is rated for the smallest gauge building wire on the circuit.
 
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bwringer

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Jan 1, 2013
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Indianapolis
no such requirement as long as the breaker or overcurrent protection is rated for the smallest gauge wire on the circuit.
Huh? The LED fixtures I've installed have tiny little stranded wires because they draw very little current (kinda the whole point of LEDs, in addition to not having to change bulbs, cool new form factors, etc,).

Are the Code Cops coming for me because I didn't change the breakers to 0.5 amp, because there ain't no such thing? If they put me in NEC jail, should I beat up the largest electrician right away to establish dominance?
 

mm08822

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Jan 13, 2012
Messages
5,875
Location
NJ
no such requirement as long as the breaker or overcurrent protection is rated for the smallest gauge wire on the circuit.
Specifically, "the smallest gauge of permanent building wire".
Fixture taps being excluded as their product listing approves them for connection onto specific circuit branch circuit ampacities.
 

wyliesdiesels

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Aug 14, 2012
Messages
19,994
Location
Modesto, CA
Huh? The LED fixtures I've installed have tiny little stranded wires because they draw very little current (kinda the whole point of LEDs, in addition to not having to change bulbs, cool new form factors, etc,).

Are the Code Cops coming for me because I didn't change the breakers to 0.5 amp, because there ain't no such thing? If they put me in NEC jail, should I beat up the largest electrician right away to establish dominance?
fixture wire isnt building wire. apples to oranges....
 
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