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Forum: Construction, Maintenance & Refit

31-07-2022, 13:51

Replies: 13

Positive or negative, only two black wires

Views: 1,596

Posted By Dave_S

Re: Positive or negative, only two black wires

It might be best to post the standards here, I'm only interested to the point that I do not believe the US or Canadian standards would not require suppression across solenoid coils. You may be right...

Forum: Construction, Maintenance & Refit

31-07-2022, 12:40

Replies: 13

Positive or negative, only two black wires

Views: 1,596

Posted By Dave_S

Re: Positive or negative, only two black wires

This PDF claims to be referencing ABYC, sorry, I don't know much about US and Canada regs but this is from "Caltrans" (seems legit) and appears to state that solenoid coils must have suppression from...

Forum: Construction, Maintenance & Refit

31-07-2022, 10:32

Replies: 13

Positive or negative, only two black wires

Views: 1,596

Posted By Dave_S

Re: Positive or negative, only two black wires

I don't understand, why would they not use one ?

I would assume it would be mandatory on gas systems.

Forum: Construction, Maintenance & Refit

30-07-2022, 10:33

Replies: 13

Positive or negative, only two black wires

Views: 1,596

Posted By Dave_S

Re: Positive or negative, only two black wires

AC or DC ?

The coils will work on both regardless of polarity except a DC coil should have a diode across it to contain back EMF, which will make it polarity sensitive (one way will work, the...

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