# Shelly 3EM short circuit due to wrong relais wiring

**URL:** <https://community.homey.app/t/shelly-3em-short-circuit-due-to-wrong-relais-wiring/36368>\
**Category:** Devices\
**Created:** [October 22, 2020, 7:40pm UTC](https://community.homey.app/t/shelly-3em-short-circuit-due-to-wrong-relais-wiring/36368 "2020-10-22T19:40:50Z")\
**Posts on this page:** 1\
**Page:** 2

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**Author:** ![MW78](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/mw78/32/58916_2.png) [@MW78](https://community.homey.app/u/MW78)\
**Post date:** [August 15, 2022, 9:45am UTC](https://community.homey.app/t/shelly-3em-short-circuit-due-to-wrong-relais-wiring/36368/24 "2022-08-15T09:45:04Z")

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In all fairness to the electrician, I just showed the instructions to my friend who is an electrician and he said the same thing. The drawing is far from perfect. Also, the following text in the instructions confused even more:

“Last step is to wire the power to the device. Please connect the power wire to the respected terminal.”

What would that be and not the power to the 3EM?

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