Auto Transfer Switch

When power goes out in my home, this switch connects my

inverter to allow my sump pump to use inverted dc power automatically.

Parts

Relay k10p-11a15-120 (DPDT, 15A, 120VAC) JAMECO # 282247, $10.95

Deep plastic conduit box

Misc wire

Two male plugs

One female plug

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    14 Discussions

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    SergeA6

    Question 8 months ago

    is your sump pump connected to 5 & 6? is there anything on 7 & 8? thanks

    4 more answers
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    eddevineSergeA6

    Answer 8 months ago

    See diagram for other connections

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    eddevineSergeA6

    Answer 8 months ago

    5&6, sump pump
    3-7, jumper
    4-8, jumper

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    DeeV15

    11 months ago

    Where does one get the plastic block to plug in the relay ?

    1 reply
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    eddevineDeeV15

    Reply 11 months ago

    Check with JAMECO, I got as a set

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    ulisesguerrero

    1 year ago

    Thank you! It was really useful to me. Its crazy how some companies sell equipment to do this simple task for 100+ usd...

    1 reply
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    eddevineulisesguerrero

    Reply 1 year ago

    Glad you can use, sometime just the simple things in life are the best

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    eddevine

    4 years ago

    I'm not sure if Home Depot has, I got mine on line (see description in parts list)

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    tdaniel10

    4 years ago on Introduction

    Hey man wondering where you got the relay from? Could I pick it up at home depot?

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    eddevine

    4 years ago

    Thank you for your comments, there may be a lot of options here but this works for me

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    snakelips1

    4 years ago

    http://www.directindustry.com/prod/heyco/liquid-tight-strain-relief-cable-glands-11746-1103353.html neither the box nor the "connectors" are water resistant. This device doesn't need to be. It should be placed above flood level.

    Nice to see you used proper water-resistant box & connectors. Instructable could use more detail and or a schematic to make it clearer. I've used this many times at remote sites for backup power switching, works great. Even if you don't have a 110vac relay you can just use an ac adaptor to match your relay voltage.