In large scale events, In the UK and EU we use a connector called power lock for our temporary installation supplies rated at 400A and 600A (single pole (5 connectors for 3 phase))
Having worked a lot in America you guys use cam lock connectors which like power lock are single pole and rated at 400A
I struggle to understand why they are still allowed & used as they have the potential to be very dangerous: For these reasons:
- Non-locking
- male to male adaptors
- T adaptors
- Any colour can be plugged into any other colour
- Very large exposed conductors easily touched when unplugged
Powerlock is: locking, will only allow phase to phase or earth to earth connections etc, and has no exposed conductors
I have even seen on TV shoots in the US where camlock is used on a public street and tee adaptors are used as joiners so the side outlet is not used leaving a live exposed conductor on a public pavement.
Although this isn’t a difference in domestic it still might be of interest,
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Camlock Tee
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Cam lock
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Powerlock