Help understanding Electrical for Clarke Vacuum Former

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    Default Help understanding Electrical for Clarke Vacuum Former

    I recently bought a used Clarke Vacuum Former. It came with a 30 amp 125v plug. I am going to wire up an outlet for the machine but want to make sure this is the correct plug.

    This is the data sheet from the company. http://crclarke.com.au/crclarke/imag...cument/750.pdf

    Should I use a 30 amp breaker? Should I continue using the 30 amp plug?

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    Default Re: Help understanding Electrical for Clarke Vacuum Former

    after down loading the manual it looks like there is some errors that you may want to contact Clarke about

    on page 3

    All 220-240V machines are fitted as standard with BS 1363A 13A moulded
    on plug

    which is OK for the UK

    but it then goes on to say :-

    110-120V machines will require a plug to conform with BS 4343 for low voltage
    supplies, a 1000VA supply will be required.

    on page 16
    you have -

    Electrical
    Voltage 220-240
    Current (max) 11A
    VA (Total) 2650
    VA - Heater 2400
    VA - Vac pump 250
    Circuit Protection - Heater 12A Circuit Breaker
    Circuit Protection - Vac Pump 5A Circuit Breaker
    Circuit Protection - Control 0.5A Circuit Breaker

    I would of expected the 120V version to take 2650 as well
    there for the supply current = 2650/120 = 22A
    that's 2.64 times the current you expect using the 1000 VA from page 3 !


    John



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    Default Re: Help understanding Electrical for Clarke Vacuum Former

    I just plug it into a 110 outlet and it turned on, however heaters wouldn't get hot and the pump wouldn't run.

    If I unattach the plug that came with the machine would you be able to tell its a 220 or 110



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    Default Re: Help understanding Electrical for Clarke Vacuum Former

    provided no one has changed the mains cable

    the 120V version has green , black and white wires
    the 240V version has green/yellow , brown and blues wires

    as a double check
    have a look at the vacuum pump it should have a label showing the required supply voltage

    have you checked the circuit breakers are all closed
    ( mechanical shock as you moved the machine could of tripped them )

    John



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    Default Re: Help understanding Electrical for Clarke Vacuum Former

    I looked at the Plug. It has three wires. Black, White and Green. This means it should work in a regular outlet around the house? Or, does a 110 outlet have to be hooked up to a 30 amp breaker and nothing else running on it?



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    Default Re: Help understanding Electrical for Clarke Vacuum Former

    assuming the 120V machine takes 2650VA like the 240V version
    you need to use an outlet that can supply 22A

    John



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    Default Re: Help understanding Electrical for Clarke Vacuum Former

    I would very much doubt that the 240v machine would draw twice the current.
    I would think its still about 10 amps as the 120v.



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    Default Re: Help understanding Electrical for Clarke Vacuum Former

    the 120V and 240V versions must have the same heating power and I'd expect they can use the same 120V heaters
    all wired in parallel for the 120V version and a series / parallel combination for the 240V version

    with 4 heating zones I'd expect they used eight 300W elements

    in the case of a resistive load like the heaters the 2400 VA = 2400 W as the current taken is in phase with the voltage

    for the 240V heater the current is 2400 divided by 240 = 10 A

    for the 120V version the current is 2400 divided by 120 = 20 A

    John

    Last edited by john-100; 12-20-2015 at 07:35 AM.


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Help understanding Electrical for Clarke Vacuum Former
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