Here is another panels question.
Are you allowed to drill hole(s) in the NEMA 12 rated enclosures? Will it compromise NEMA 12 rating and UL listing of the panel? We are drilling holes for 4-40 screws to attach nameplates outside of enclosures and seal these holes with the screws using silicon sealant. Is anybody can point me to the governing instructions?
Thank you.
PaulB.
Are you allowed to drill hole(s) in the NEMA 12 rated enclosures? Will it compromise NEMA 12 rating and UL listing of the panel? We are drilling holes for 4-40 screws to attach nameplates outside of enclosures and seal these holes with the screws using silicon sealant. Is anybody can point me to the governing instructions?
Thank you.
PaulB.