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  1. #1
    Join Date
    Apr 2007
    Location
    Townsville
    Posts
    9

    Default Shed Power Question

    I have a workshop - that is on a separate 20amp circuit off my main board. The circuit within the shed is a common GPO, light circuit.

    My question is, what is the likely size of the cable connection to my shed?
    What would be the maximum amount of amps I could draw over this likely installed cable.

    mdf

  2. #2
    Join Date
    Sep 2002
    Location
    Minbun, FNQ, Australia
    Age
    66
    Posts
    1

    Default

    What is the distance from the switch board to the shed?
    Cliff.
    If you find a post of mine that is missing a pic that you'd like to see, let me know & I'll see if I can find a copy.

  3. #3
    Join Date
    Jan 2007
    Location
    Katoomba NSW
    Posts
    332

    Default

    The cable is probably 2.5mm sq. you can draw up to the rating of the circuit breaker/fuse which is 20 amp.
    Those were the droids I was looking for.
    https://autoblastgates.com.au

  4. #4
    Join Date
    Sep 2002
    Location
    Minbun, FNQ, Australia
    Age
    66
    Posts
    1

    Default

    Quote Originally Posted by NCArcher View Post
    The cable is probably 2.5mm sq. ....
    If the shed is close to the house.... may be larger if it is further away.
    We have a shed with a common circuit that is 24M from the switchboard to the first power point & whoever installed it ran the same sized building wire that is used for the hotwater & the stove.
    Cliff.
    If you find a post of mine that is missing a pic that you'd like to see, let me know & I'll see if I can find a copy.

  5. #5
    Join Date
    Oct 2003
    Location
    Kentucky NSW near Tamworth, Australia
    Age
    86
    Posts
    1,067

    Default

    10 amp, 15 amp and 20 amp circuits use 2.5mm2 cable. the difference is the number of points you can have on the various circuits. All use 20 amp breakers.

    There are many variables that determine what each can carry.

  6. #6
    Join Date
    Jun 2004
    Location
    Canberra
    Age
    45
    Posts
    314

    Default

    My shed is about 15m from the main board.

    My electrician used 6mm cable to run to the new shed and put a sub board in the shed with four circuits.

    However, I requested this in case I want to run higher power (15a) equipment etc later.

    If I just wanted a few GPOs I think he was just going to use 2.5mm.

    Joel
    I want to die peacefully in my sleep like my grandfather, not screaming in terror like the passengers in his car.

  7. #7
    Join Date
    Jun 2006
    Location
    Brisbane
    Posts
    45

    Default

    Quote Originally Posted by mdfdust View Post
    My question is, what is the likely size of the cable connection to my shed?
    At least 2.5mm. It could be a larger cable and a 20A breaker installed due to a number of reasons.

    What would be the maximum amount of amps I could draw over this likely installed cable
    20A continous, more depending on the duty cycle of what you're operating. Circuit breakers have inverse-time properties so you can draw more current than what it's rated for as long as you then give it sufficient time in between. From memory you should be able to get 40A from between 30 to 120 seconds until it trips.

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