Normal Condition 2
Normal Condition 2 : As related to intrinsically safe and nonincendive systems, equipment is under normal conditions when it conforms electrically and mechanically with its design specifications and is used within the limits specified by the manufacturer. Normal conditions for intrinsically safe systems include the following: (a) Supply voltage at maximum rated value. (b) Environmental conditions within the ratings given for the apparatus or associated apparatus. (c) Tolerances of all components at their most unfavorable conditions. (d) Adjustments at their most unfavorable conditions. (e) Opening of any one, shorting of any two, and grounding of any one of the field wires of the intrinsically safe circuit(s). Normal conditions for nonincendive equipment include the following: (a) Supply voltage, current, and frequency at rated values. (b) Environmental conditions within the ratings given for the apparatus. (c) All tool-removable parts (i.e. covers) in place. (d) Adjustments at their most unfavorable settings. (e) All operator accessible adjustments at their most unfavorable settings. (f) Opening, shorting, and grounding of the nonincendive field wiring
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