Wire Nuts (factory) vs splice

DrewE wrote:
...the worse that can happen is that your tank level meter fails to give an accurate indication...

It will do that even if the wire nuts remain in place...

Not all wire nuts are created equal. I've had wires come out from wire nuts when tucking them the into junction, even though they had been tested by tugging them after the wire nut had been turned on, and they would not pull out from the joint.

mike-s wrote:

myredracer wrote:
I have to disagree with your disagreement. Wire nuts, aka "marettes", are used in buildings all the time including critical installations like in hospitals.

Name where in a hospital, and subject to frequent vibration, they're properly used.

Where in a hospital is there frequent vibration in the building structure? All I've ever seen in any building construction in commercial to institutional (incl. hospitals) is standard marettes (and def. not residential grade) for branch circuits. Meets CSA, code and gov't requirements (where applicable) and engineers specify conductors to be pre-twisted.

Ideal is a large manufacturer of wire nuts, their instructions are:

Installation Instructions
1.Turn off power before removing or installing connectors.
2.Strip connectors to the correct strip length per the chart
3.Straighten and align frayed strands.
4.Hold wires together with ends even. Lead stranded wires slightly ahead of solid wires.
5.Pre-twisting acceptable, but not required. For pre-twisting;
strip wires long, hold wires together with insulation even,
twist wire ends together, trim to recommended strip length.
6.Insert bundle into connector and twist clockwise until tight