Warning View Navion electrical junction box
- Thread starter Sanibelview
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If you have answers, please help by responding to the unanswered posts.
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SeilerBird
Well-known member
They should not have been using wire nuts there in the first place. But it is not the size that caused the failure. The wires were not prepared properly before the wire nut was installed. When you do that vibration will cause the problem you see here.
OP
OP
Sanibelview
Well-known member
Thanks for the info. What is properly prepared. I cut off to good wire, wrapped the stranded around the solid and screwed on red wire nut tight and also wrapped with electrical tape.
John Canfield
Site Team
Thanks for the tip!
SeilerBird
Well-known member
The wires should be twisted together with pliers to make a firm mechanical contact. Then trim the end to about a half an inch and then put on the wire nut. The wire nut should not be responsible for making the mechanical contact. I should make a video.Sanibelview said:
John Hilley
Well-known member
I don't think there is any reason not to use wire nuts if properly installed. That connection is fine with a yellow wire nut. Proper installation is the key, especially when one wire is stranded. I believe all wiring in an RV should be stranded and marine certified. WAGO connectors are also a good choice. Just use connectors rated for the application.
Here are installation instructions from manufacturers
Ideal Industries
https://idealind.com/content/dam/electrical/assets/WireTermination/WireConnectors/TwistOn/WireNut/WireNut%20WireConnector%20Instructions.pdf
3M
https://multimedia.3m.com/mws/media/37674O/3m-r-y-wire-connector.pdf
Here are installation instructions from manufacturers
Ideal Industries
https://idealind.com/content/dam/electrical/assets/WireTermination/WireConnectors/TwistOn/WireNut/WireNut%20WireConnector%20Instructions.pdf
3M
https://multimedia.3m.com/mws/media/37674O/3m-r-y-wire-connector.pdf
ClassyC
Well-known member
In the picture it looks like the strain relief for the Romex line isn?t inserted in the box. I?ve always favored Buchanan crimps for solid to stranded wire connections.
SeilerBird
Well-known member
There is a reason, vibration will allow a wire nut to fall off.John Hilley said:
John Hilley
Well-known member
Properly installed I don't think vibration is a problem, especially as suggested, if wrapped with electrical tape in the right direction. I think screw terminals are more susceptable to vibration problems.
Isaac-1
Well-known member
I am surprised no one has commented on modern spring loaded wire nut replacements, either the reusable Wago lever clips like https://smile.amazon.com/Lever-Nut-Assortment-Conductor-Connector-Terminal/dp/B07C821XR5 or the cheaper single use push wire connectors like https://smile.amazon.com/Ideal-2-Port-Non-Twist-Connector-Stranded/dp/B07DVFX86N
SeilerBird
Well-known member
The problem is that very few people install a wire nut the way it is suppose to be installed and even less use electrical tape. Screw terminals are also not good. A crimped connector is the way to go.John Hilley said:
John Hilley
Well-known member
Crimp connectors are generally not used on solid wire. It would have to be a crimp connector listed for solid wire and crimped by a listed crimper. If not crimped correctly there could be a poor connection that would heat under load and do exactly what the picture shows.
All in all the wire nut is probably the best solution or a WAGO type.
All in all the wire nut is probably the best solution or a WAGO type.
SeilerBird
Well-known member
I have crimped about a million ground connections of solid wire in my career. I have also fixed a lot of burned boxes because of wire nuts. Pretty hard to screw up a crimp connection, just squeeze the handles until it reaches home.
John Canfield
Site Team
Okay guys, this thread has run the course so I'm going to close it.
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