Hi, My recommendation is to label it as C3 according to regulation 514.9. Also, since there is more than one supply, regulation 514.11.1 applies and it should be marked as C3 as well. probably easier just to label up than type up on the report. 

Hi, My recommendation is to label it as C3 according to regulation 514.9. Also, since there is more than one supply, regulation 514.11.1 applies and it should be marked as C3 as well. probably easier just to label up than type up on the report. 

AMK said:

probably easier just to label up than type up on the report

Yes, it wouldn't take much to write, "ON" and "OFF" with your Sharpie. Surely simple remediation must be good for repeat custom.

No, I do not think that there has to be a single point of isolation.

Chris Pearson said:

Yes, it wouldn't take much to write, "ON" and "OFF" with your Sharpie

But surely you would in effect be "modifying" a product based on the fact that current product standards for isolators require this information to be provided. Regardless, for durability wouldn't the "durable label printer" be better, and for clarity "l" and "O" might be better rather than using English?

Modifying in the same sense that we modify a DB when we label the circuits?

514.1.1 seems to be relevant, but that requires the purpose of each item of switchgear and control gear to be identified. So there should be a label for "main switch".

My old Federal Electric DB is not entirely clear, but on close inspection, "1" is visible when the dolly is up and "0" when it is down. By contrast my modern main switch has a green/red flag.

There is scope for confusion in UK where at least the lay person is used to down for on. Traffic lights are green for go, which is not necessarily safe; and red for stop, which is not necessarily dangerous.