Panel/Switchgear Yellow Electricity Warning Labels

AJJewsbury:

BS 7671 regulation 514.10.1 seems to be phrased all in terms of nominal voltages, so I would expect notices in compliance of that regulation at least to show nominal. Note that it's unusual to actually need such a notice from a BS 7671 point of view these days - since the requirement only applies where the voltage exceeds 230V nominal to earth - thus nothing is needed for either single phase 230V nominal systems (despite possibly up to 253V being present), or normal three-phase 230/400V systems despite the nominal 400V between lines.

  - Andy.

More importantly, nominal voltage to Earth ... meaning that a typical 400 V three-phase system need not have a label.


Panels manufactured off-site will most likely be constructed to BS EN 61439-series and/or BS EN 60204-1 - so labelling should comply with the requirements of the respective standard.


I don't think there is a specific requirement in BS EN 61439-series for a specific label, but BS EN 60204-1 requires just the ISO 7010-W012 symbol, (just that, alone - I guess you could indicate voltage if you wanted, but there is no requirement) on any enclosure that contains equipment that might give rise to electric shock. There are a few cases where the warning sign is not required.


Some contract specifications have labelling requirements over and above the standards, however.


The minimum size of text and symbols, and recommendations for fonts, on labels is now addressed by BS EN 82079-1.

AJJewsbury:

BS 7671 regulation 514.10.1 seems to be phrased all in terms of nominal voltages, so I would expect notices in compliance of that regulation at least to show nominal. Note that it's unusual to actually need such a notice from a BS 7671 point of view these days - since the requirement only applies where the voltage exceeds 230V nominal to earth - thus nothing is needed for either single phase 230V nominal systems (despite possibly up to 253V being present), or normal three-phase 230/400V systems despite the nominal 400V between lines.

  - Andy.

More importantly, nominal voltage to Earth ... meaning that a typical 400 V three-phase system need not have a label.


Panels manufactured off-site will most likely be constructed to BS EN 61439-series and/or BS EN 60204-1 - so labelling should comply with the requirements of the respective standard.


I don't think there is a specific requirement in BS EN 61439-series for a specific label, but BS EN 60204-1 requires just the ISO 7010-W012 symbol, (just that, alone - I guess you could indicate voltage if you wanted, but there is no requirement) on any enclosure that contains equipment that might give rise to electric shock. There are a few cases where the warning sign is not required.


Some contract specifications have labelling requirements over and above the standards, however.


The minimum size of text and symbols, and recommendations for fonts, on labels is now addressed by BS EN 82079-1.