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Sorry if there is a straight forward answer but my partner has converted a trailer into a drinks unit. She has a fridge a freezer and a coffee machine. Also about 5double sockets and lighting. The question we are stumped on is when applying for venues they asked which 32amp we need single or three? and I haven't the foggiest . If anyone could help would be so grateful.

Many thanks

James

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closed as off-topic by Brian Carlton, PeterJ, Voltage Spike, Dmitry Grigoryev, DoxyLover Aug 3 '17 at 0:42

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Questions on the use of electronic devices are off-topic as this site is intended specifically for questions on electronics design." – Brian Carlton, PeterJ, Voltage Spike, Dmitry Grigoryev, DoxyLover
If this question can be reworded to fit the rules in the help center, please edit the question.

  • \$\begingroup\$ What country? You give no clue in your question or user profile. \$\endgroup\$ – Transistor Jul 28 '17 at 19:25
  • \$\begingroup\$ If the thing will work with a single 32 Amp circuit, I'd go with single phase, assuming that 3-phase power is not universally available. You could make an adaptor cable to permit a single-phase connector to be plugged into a 3-phase outlet, using only one phase, just in case you find a venue that has only three-phase outlets. \$\endgroup\$ – Peter Bennett Jul 28 '17 at 19:40
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    \$\begingroup\$ Show a photo of your trailer fuseboard and the plug on the mains lead to your trailer. \$\endgroup\$ – Transistor Jul 28 '17 at 19:45
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This answer assumes that you are in Europe.

enter image description here enter image description here

Figure 1. 32 A single phase plug and socket (left) and 3-phase (right).

The single-phase connectors have three pins: live (L), neutral (N) and earth (E).

The three-phase connectors have five pins: live 1 (L1), live 2 (L2), live 3 (L3), neutral (N) and earth (E).

It is more than likely that your trailer has been wired for single phase.

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The biggest question will be what the fridge and freezer takes, single-phase or three-phase ... only you, your partner, or electrician can answer that.

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  • \$\begingroup\$ I thought only the stove used three-phase. \$\endgroup\$ – Harry Svensson Jul 28 '17 at 21:31
  • \$\begingroup\$ Be careful here! On past experience when a snackwaggon talks about a coffee machine it can mean anything from a little single phase thing plugged into a domestic socket up to some sort of monster expresso rig with loads of chrome and live steam from a 10kW boiler! If single phase is all you need then that is far more commonly available, but if you need three phase, you need three phase. \$\endgroup\$ – Dan Mills Jul 28 '17 at 22:06

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