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#219339 05/06/18 09:50 AM
Joined: Oct 2016
Posts: 10
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 ?
Tjia1981 #219361 05/21/18 04:40 AM
Joined: Dec 2002
Posts: 205
Typically to operate a contactor, controlling the supply.

Tjia1981 #219364 05/21/18 10:41 AM
Joined: Oct 2016
Posts: 10
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

Tjia1981 #219374 05/23/18 12:24 PM
Joined: Dec 2002
Posts: 205
Well, just not used in your case, and probably has no connection, but that's what it was intended for if needed.

Tjia1981 #219377 05/24/18 12:06 PM
Joined: Apr 2002
Posts: 7,323
Likes: 7
Perhaps an indicator light, or a monitoring device?

Tjia1981 #219459 07/16/18 10:03 AM
Joined: Aug 2008
Posts: 62
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

Tjia1981 #219460 07/18/18 10:01 AM
Joined: Oct 2016
Posts: 10
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!

Tjia1981 #222002 11/10/22 10:07 AM
Joined: Nov 2022
Posts: 1
New Member
It’s the first time I see a plug like this! Thanks for the explanation! Now I will be more aware of the types of plugs that exist.
I use only the regular ones in my house, unfortunately. It would be cool if the plugs looked more interesting than they are now. Why are the US plugs the way they are? I think the European ones look cooler.
I have a few amazon smart plugs in the house too. They help me control electricity consumption and turn on and off devices via wi-fi. These are some of the best household devices I’ve ever purchased. If you are lazy and don’t want to get up whenever you need to unplug something, then it’s for you.

Last edited by leonardgeryol; 11/10/22 10:07 AM.

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