Forum Discussion
MEXICOWANDERER
Mar 26, 2018Explorer
FREAKIN' HOUSEHOLD ELECTRICAL DISTRIBUTION AND SAFETY DEVICES DO NOT BELONG IN HOUSES THAT GO BOUNCING DOWN THE ROAD.
Use a EURO TERMINAL a genuine one with a tab beneath the screw. Screw turns tight doesn't it? It's so they do not VIBRATE LOOSE.
The sane alternative is to DROP the covers with the power off, and verify the flat blade or allan head set screw is tight, once-er-year. Normal maintenance.
I use marine breakers and switches on Quicksilver. Not just #8 screws. I replaced all the screws with 1/4" longer SEMS screws and tightened the snot out of them. Ring terminals fit on the opposite side where the screw threads are: KEPS nuts clamp ring terminals to breaker and switch screws. With shake-proof lock washers on both screw and nut, and having the screw pass through a threaded tab on the switch and breaker, they cannot loosen EVER. I wired commercial marine vessels this way.
Check out set screws. A special kind has FLUTES on the bottom of the screw. When they dig into THNN wires, it is hard as hell to break them loose.
When tin coating on aluminum fixtures overheats the tin is lost. This is a time bomb. The tin is there in ALL house and industrial appliances. Aluminum oxidizes within MINUTES of being cleaned. Brush or scrape aluminum conduction surfaces then immediately slop on silicone dielectric grease on the terminal and on bared conductor copper wires.
This is from the School Of Hard Knocks
From Wikipedia
Knurled cup point
Knurl point screws are generally used to secure one object within another. The serrated ridge on the knurl cup set screw helps reduce loosening due to vibration. The knurled point combines digging action of the cup point with counter-clockwise locking knurls that have a ratchet-locking action which helps resist loosening, even under the most severe vibrations.[3][4]
Knurl point set screws should not be reused because the cutting edges of the knurls are deflected when tightened. During removal, the cutting edges are torn and no longer have full strength to resist unscrewing. ISO standard for Knurled cup point set screw is ISO 4029
(non-reusability ONLY FOR set screw to STEEL. Set screw to copper is reusable.)
Use a EURO TERMINAL a genuine one with a tab beneath the screw. Screw turns tight doesn't it? It's so they do not VIBRATE LOOSE.
The sane alternative is to DROP the covers with the power off, and verify the flat blade or allan head set screw is tight, once-er-year. Normal maintenance.
I use marine breakers and switches on Quicksilver. Not just #8 screws. I replaced all the screws with 1/4" longer SEMS screws and tightened the snot out of them. Ring terminals fit on the opposite side where the screw threads are: KEPS nuts clamp ring terminals to breaker and switch screws. With shake-proof lock washers on both screw and nut, and having the screw pass through a threaded tab on the switch and breaker, they cannot loosen EVER. I wired commercial marine vessels this way.
Check out set screws. A special kind has FLUTES on the bottom of the screw. When they dig into THNN wires, it is hard as hell to break them loose.
When tin coating on aluminum fixtures overheats the tin is lost. This is a time bomb. The tin is there in ALL house and industrial appliances. Aluminum oxidizes within MINUTES of being cleaned. Brush or scrape aluminum conduction surfaces then immediately slop on silicone dielectric grease on the terminal and on bared conductor copper wires.
This is from the School Of Hard Knocks
From Wikipedia
Knurled cup point
Knurl point screws are generally used to secure one object within another. The serrated ridge on the knurl cup set screw helps reduce loosening due to vibration. The knurled point combines digging action of the cup point with counter-clockwise locking knurls that have a ratchet-locking action which helps resist loosening, even under the most severe vibrations.[3][4]
Knurl point set screws should not be reused because the cutting edges of the knurls are deflected when tightened. During removal, the cutting edges are torn and no longer have full strength to resist unscrewing. ISO standard for Knurled cup point set screw is ISO 4029
(non-reusability ONLY FOR set screw to STEEL. Set screw to copper is reusable.)
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