General > General Technical Chat

Accidentally grounded live wire from UPS line

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james_s:
Even if that weren't the case, it isn't the responsibility of the UPS to check the polarity, that's up to the property owner to take care of.

cmosfxx:

--- Quote from: james_s on August 09, 2021, 05:29:30 am ---Even if that weren't the case, it isn't the responsibility of the UPS to check the polarity, that's up to the property owner to take care of.

--- End quote ---

It is if you sell the same unit to europe. Schuko plug has no markings and nothing really prevents you from plugging the cord the "wrong" way.

james_s:

--- Quote from: cmosfxx on August 09, 2021, 07:13:55 am ---It is if you sell the same unit to europe. Schuko plug has no markings and nothing really prevents you from plugging the cord the "wrong" way.

--- End quote ---

What stops you from plugging any other equipment in the wrong way if the UPS is not there? Does everything have a polarity indicator? I'm kind of surprised that the Schuko plug has not been updated by now to at least have a polarity marking on it, a notch could be added easily enough to make polarized plugs while still allowing the old non-polarized plugs to be inserted.

tom66:

--- Quote from: james_s on August 09, 2021, 07:12:14 pm ---
--- Quote from: cmosfxx on August 09, 2021, 07:13:55 am ---It is if you sell the same unit to europe. Schuko plug has no markings and nothing really prevents you from plugging the cord the "wrong" way.

--- End quote ---

What stops you from plugging any other equipment in the wrong way if the UPS is not there? Does everything have a polarity indicator? I'm kind of surprised that the Schuko plug has not been updated by now to at least have a polarity marking on it, a notch could be added easily enough to make polarized plugs while still allowing the old non-polarized plugs to be inserted.

--- End quote ---

Unearthed European appliances near-universally use double-pole switches for this reason. 

It's a bit of a loophole for IEC connectors. In the UK and in some other European countries, our plugs ensure polarisation so most IEC connectors use single-pole switches. 

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