I generally tape wire nuts that are used on power connections if motors are in the cabinet. Why vibration, plus on a gas pump there are at times way more splices than the junction box can easily contain(don't blame me I don't size the equipment supplied by a manufacturer) so they get jammed in there. When you come back to troubleshoot its helpful if stuff doesn't fall apart when pulling it back out.
..We use the Ideal,.."Tan" nutz, and although we DO pretwist,we don't tape..The only thing I want taped is the device, if it's in a metal box,..otherwise, my wire nutz are "tapeless'... AR
.."if it ain't fixed,don't break it...call a Licensed Electrician"