Auto Transfer Switch

3,954

33

14

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

Share

    Recommendations

    • Growing Beyond Earth Maker Contest

      Growing Beyond Earth Maker Contest
    • Sew Tough Challenge

      Sew Tough Challenge
    • Backyard Contest

      Backyard Contest

    14 Discussions

    0
    None
    SergeA6

    Question 1 year ago

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

    4 answers
    0
    None
    eddevineSergeA6

    Answer 1 year ago

    See diagram for other connections

    0
    None
    eddevineSergeA6

    Answer 1 year ago

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

    0
    None
    DeeV15

    1 year ago

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

    1 reply
    0
    None
    eddevineDeeV15

    Reply 1 year ago

    Check with JAMECO, I got as a set

    0
    None
    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
    0
    None
    eddevineulisesguerrero

    Reply 1 year ago

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

    0
    None
    eddevine

    5 years ago

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

    0
    None
    tdaniel10

    5 years ago on Introduction

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

    0
    None
    eddevine

    5 years ago

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

    0
    None
    snakelips1

    5 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.