The income section of a LV switchgear (line-side of main OCPD) has a incident energy of 65 cal/cm2 (Dangerous).

The adjacent section (load side of OCPD) has a incident energy of 3 cal/cm2.

The switchgear is open frame, so there is no barriers between both sections.

What kind of label would you affix to this switchgear?

Options:

1. Only one for the whole panels (incoming and feeder sections) with the AFIE of 65 cal/cm2.
2. Dual label, for incoming section 65 cal/cm2 and for all feeder sections 3 cal/cm2.
3. Other solution.

The problem arises to be so close to a high incident energy area using only PPE of 3 cal/cm2.

Thanks.

Without barriers you would have to use the higher rating out to an arc flash boundary that equals the lower rating.

According to some interpretations operating the main breaker would be illegal because you are above 40Cal/cm2. Working so close is probably no safer and could be more dangerous.