11-09-2021, 10:44 AM
Please All do not use WD40 on your electric contacts...WD =water dispersant. It leaves (or used to a few years ago so still does unless formula changed) a coating on the surface when dried out.....how do I know? story.....
At sea, large ship with whole ship many speakers and control boxes for announcements. Each speaker box and control box had several multi-contact large relays (the type large enough that you could use a contact burnisher on to clean the contacts). I tasked a junior officer to go round and service the, fully waterproof, boxes.....he did so by spraying all relays with WD40.......chaos resulted with many controls/speakers not working. He had to spend a long, long time cleaning every individual relay contact until all was again working.
There is a purpose formulated electrical contact cleaning fluid available. For switch contacts there is also a CONTACT GREASE specially for the purpose that you smear a very thin cote on the contacts. It prevents sparking and hence burning of the contacts.
Dennis
At sea, large ship with whole ship many speakers and control boxes for announcements. Each speaker box and control box had several multi-contact large relays (the type large enough that you could use a contact burnisher on to clean the contacts). I tasked a junior officer to go round and service the, fully waterproof, boxes.....he did so by spraying all relays with WD40.......chaos resulted with many controls/speakers not working. He had to spend a long, long time cleaning every individual relay contact until all was again working.
There is a purpose formulated electrical contact cleaning fluid available. For switch contacts there is also a CONTACT GREASE specially for the purpose that you smear a very thin cote on the contacts. It prevents sparking and hence burning of the contacts.
Dennis