Question: Does the NEC505 allow self certification by the manufacturer for electrical equipments placed in Class 1 Zone 0, Zone 1 or Zone 2?
Background:
NEC505.9 state that: ?suitability of identified equipment shall be determined by one of the following: (1) Equipment listing or labeling, (2) Evidence of equipment evaluation from qualified test-laboratory or inspection agency concerned with the product evaluation, (3) Evidence accepted to the authority having jurisdiction such as MANUFACTURER?S SELF-EVALUATION or an owner engineering judgment?.
However, NEC505.20 states under Equipment Requirements: ?In Class 1 Zone 0 or Zone 1 or Zone 2, only equipment specifically listed AND marked as suitable for the location shall be permitted? (i.e. there is no mention of MANUFACTURER?S SELF-EVALUATION as an option, Equipment must be listed and marked).
My understanding that NEC505.20 mandates equipments placed in Zones 0, 1, or 2 to be LISTED AND MARKED which means third party certified, and manufacture?s self-certification is not an option. While the NEC505.9 (1) ?Evidence accepted to the authority having jurisdiction such as MANUFACTURER?S SELF-EVALUATION or an owner engineering judgment? is intended for items such as sealers or enclosures (e.g. NEMA 4X enclosure) or the like.
Background:
NEC505.9 state that: ?suitability of identified equipment shall be determined by one of the following: (1) Equipment listing or labeling, (2) Evidence of equipment evaluation from qualified test-laboratory or inspection agency concerned with the product evaluation, (3) Evidence accepted to the authority having jurisdiction such as MANUFACTURER?S SELF-EVALUATION or an owner engineering judgment?.
However, NEC505.20 states under Equipment Requirements: ?In Class 1 Zone 0 or Zone 1 or Zone 2, only equipment specifically listed AND marked as suitable for the location shall be permitted? (i.e. there is no mention of MANUFACTURER?S SELF-EVALUATION as an option, Equipment must be listed and marked).
My understanding that NEC505.20 mandates equipments placed in Zones 0, 1, or 2 to be LISTED AND MARKED which means third party certified, and manufacture?s self-certification is not an option. While the NEC505.9 (1) ?Evidence accepted to the authority having jurisdiction such as MANUFACTURER?S SELF-EVALUATION or an owner engineering judgment? is intended for items such as sealers or enclosures (e.g. NEMA 4X enclosure) or the like.
