Can wire pulling compound be used for the conductors of an isolated power system?
Issue:
Installation/startup
Product Line:
Hospital Isolated Power Systems
Environment:
NFPA99,NEC517.160
Resolution:
Wire pulling compound should not be used.
NEC 517.160 (A) (6) Wire-Pulling Compounds.
Wire-pulling compounds that increase the dielectric constant shall not be used on the secondary conductors of the isolated power supply.
Informational Note No. 1: It is desirable to limit the size of the isolation transformer to 10 kVA or less and to use conductor insulation with low leakage to meet impedance requirements.
Informational Note No. 2: Minimizing the length of branch-circuit conductors and using conductor insulations with a dielectric constant less than 3.5 and insulation resistance constant greater than 6100 megohm-meters (20,000M ohm-feet) at 16°C (60°F) reduces leakage from line to ground, reducing the hazard current.
Installation/startup
Product Line:
Hospital Isolated Power Systems
Environment:
NFPA99,NEC517.160
Resolution:
Wire pulling compound should not be used.
NEC 517.160 (A) (6) Wire-Pulling Compounds.
Wire-pulling compounds that increase the dielectric constant shall not be used on the secondary conductors of the isolated power supply.
Informational Note No. 1: It is desirable to limit the size of the isolation transformer to 10 kVA or less and to use conductor insulation with low leakage to meet impedance requirements.
Informational Note No. 2: Minimizing the length of branch-circuit conductors and using conductor insulations with a dielectric constant less than 3.5 and insulation resistance constant greater than 6100 megohm-meters (20,000M ohm-feet) at 16°C (60°F) reduces leakage from line to ground, reducing the hazard current.
Publicado para: Schneider Electric Mexico
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