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How do you protect switch contacts from welding closed?

Answer:

Answer

I ran into this trick over 30 years ago. First make sure the power source is off and then put a very thin coating of vaseline on the contacts. This won't stop the welding alltogether, but it'll slow the occurance way down.

First answer by Backyard Mech537. Last edit by Backyard Mech537. Contributor trust: 53 [recommend contributor ]. Question popularity: 12 [recommend question].

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Relevant answers:

What is the symbol for normally closed contacts?
The symbol for a normally closed set of contacts looks similar to the following -I/I-
What is a normally closed switch?
A normally closed switch is a switch that is normally closed. When you operate it, it opens.
When a switch is on is a circuit open or closed?
Turning a switch on closes a circuit.
A closed switch does what to a circuit?
Completes it.
How does a normally closed contact work?
A NC contact in a relay will open when the relay is energized. An auxiliary NC contact, in relation to a contactor, will open when the contactor is energized.