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  1. #1
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    Aug 2016
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    Default Power in the shed

    Hi All , we are moving into our new place at the end of the month, there are no 15amp points in the shed currently.
    I will be getting a sparkie in to install hopefully atleast 3 15amp points , there seems to be enough 10amp points spread around ( 8 or so ).
    The sub panel in the shed appears to be on a 40amp isolator whilst the breaker at the main house box says 80a.
    Does this seem like it will be easily possible?
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  3. #2
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    Oct 2008
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    Quite strange set up with 40 amp main breaker in the shed and 80amp breaker at the main switchboard, unless the main breaker is rated for peak starting current.

    From the photo of the shed board, you’ve got 2 circuits wired up, each rated at 30 amp, we’ll at least the centre C/b. The right most has different model on the top right corner meaning it could be less, we can’t see the rating.
    One of the c/bs could be the 10amp power point circuit, who knows, you’d have to trace the circuit.

    As for the 15amp circuit, you’d need to determine how many 15amp machines you are running at once and what each draws running. You may also need to determine the peak starting current of each machine, this will also determine your C/b rating.


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  4. #3
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    Quote Originally Posted by Runningman View Post
    Quite strange set up with 40 amp main breaker in the shed and 80amp breaker at the main switchboard, unless the main breaker is rated for peak starting current.

    From the photo of the shed board, you’ve got 2 circuits wired up, each rated at 30 amp, we’ll at least the centre C/b. The right most has different model on the top right corner meaning it could be less, we can’t see the rating.
    The 30 A you are referring looks more like it's the 30mA which is the RCB triggering current - there's no indication of the current rating of those RCBs unless you can decipher the Lanson model numbers.

  5. #4
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    Quote Originally Posted by BobL View Post
    The 30 A you are referring looks more like it's the 30mA which is the RCB triggering current - there's no indication of the current rating of those RCBs unless you can decipher the Lanson model numbers.
    Ahh you’re right Bob, my mistake. Yes 30mA. I was working from memory when I posted. The right most c/b is also for light circuit not the power point circuit as I first posted. Means even less current available from the power circuit, if it shares the 10amp and 15amp circuit.

    Personally I’d get a sparky in to discuss what you’d run concurrently and see if you can add a dedicated 15amp circuit c/b and still have enough spare on the main DB off the 80 amp


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  6. #5
    Join Date
    Jan 2007
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    Katoomba NSW
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    Default

    The 'breaker' on the main board is a switch not a CB. The workshop is possibly off the 40A safety switch next to the workshop switch. The capacity of the circuit is determined by the cable size, not the CB.
    The RCDs in the shed are 20A for power and 10A for lights. Both operate at 30mA for earth leakage. At a guess, you could add 1x 15A cct but your sparky would need to have a look and determine what you can fit without upgrading the mains
    Those were the droids I was looking for.
    https://autoblastgates.com.au

  7. #6
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    Aug 2016
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    Thanks for the responses guys.
    I will get someone in to look at things when we get the keys.
    I don't plan on ever running more than 1 machine + my 2hp dusty at a time , just would like each machine to have its own permanent outlet.

  8. #7
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    Jan 2014
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    Sydney Upper North Shore
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    I don’t know if FNQ is the same as NSW but when I got the main switch board and wiring upgraded in my house about two years ago, the mains service fuse went from 100A to 80A. When I asked why, the response from the electricity supplier ( and it’s on their website) was that the new meters they are installing are not 100A rated so all new installations or “upgrades?” where new meters are fitted, the main services fuses are downgraded to 80 A.

    I had a new sub board put in the shed. It has a 40A breaker in the main board. In the shed I have 3 x 15A power points and 6 x 10A power points. Each of the 15A circuits are individually protected.

  9. #8
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    Jun 2005
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    Quote Originally Posted by barramonday View Post
    Thanks for the responses guys.

    I don't plan on ever running more than 1 machine + my 2hp dusty at a time , just would like each machine to have its own permanent outlet.
    Plans are like sheds, they are never finished. My shed has had more changes than I ever thought possible so I am an expert in this field and at the moment it is looking like a big extension might be put on it. Seriously, do not limit yourself to what you have now, it always ends up causing problems.
    CHRIS

  10. #9
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    just would like each machine to have its own permanent outlet.
    I'n the same, I started out with 1 x 15A, and now I have 6 x 15A.
    Compressor on a single socket 15A GPO
    AC on a single socket 15A GPO
    TS on a double socket 15A GPO - other socket is for a router as I never run them at the same time
    DC also on a double socket 15A GPO - one socket is for welder/plasma cutter as I never run them at the same time
    BSaw and BSander are on a double socket 15 GPO - they might both be on but are not both under load at the same time
    One double socket 15A GPO is a spare for motor testing and sometimes used to wash horse apparel in the old washing machine.

  11. #10
    Join Date
    May 2009
    Location
    Sapphire Coast NSW
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    69
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    434

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    Quote Originally Posted by barramonday View Post
    Thanks for the responses guys.
    I will get someone in to look at things when we get the keys.
    I don't plan on ever running more than 1 machine + my 2hp dusty at a time , just would like each machine to have its own permanent outlet.

    when you are talking to the sparky, check how much extra it would be to have a twenty amp circuit ... i had some work being done and had two 20 amp circuits put in at negligible extra cost ... as someone said, “plans change “ ... you may need that later ....

    regards david

  12. #11
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    Aug 2016
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    So I had the work done yesterday.
    Whoever originally wired up the shed had the forethought to run 10mm cable from the house box. This meant that I was able to get 2 20amp points put in, one on either side of the shed.

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