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Joined: Oct 2016
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Plug terminals
This morning ,I got a three-phase plug with 6 wire terminals( see pictures), L1 , L2, L3, N/W, Earth, and a "pilot" terminal, I don't know what 's the "pilot" terminal use for , for testing or other purposes ?
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Joined: Dec 2002
Posts: 206
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Typically to operate a contactor, controlling the supply.
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Joined: Oct 2016
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Hi ,geoff, Thank you for your answer
This picture was taken in my workshop , and these three-phase plug mainly used for connecting equipment like water pump , electric welding machine to the AC 380V distribution box on the wall,no control circuit inside the distribution box , and controlling the power supply only by RCD
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Joined: Dec 2002
Posts: 206
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Well, just not used in your case, and probably has no connection, but that's what it was intended for if needed.
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Joined: Apr 2002
Posts: 7,381 Likes: 7
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Perhaps an indicator light, or a monitoring device?
John
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Joined: Aug 2008
Posts: 62
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If it's a CEE Standard plug, the Pilot contact is for operating a Contactor, so the plug contacts don't wear off when connecting or disconnecting under load. See here, chapter 4.1 https://en.wikipedia.org/wiki/IEC_60309
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Joined: Oct 2016
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Hi, andey. This is a "MENNEKES" plug with made in Germany, I have seen the fully detailed explanation about the "pilot" contact on wikipedia website, thank you for your help!
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Posts: 70
Joined: January 2002
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