630-Electric Welders
I. General
considers both the magnitude and the duration of the load while the welder is in use.
considers both the magnitude and the duration of the load while the welder is in use.
FPN: For further information, see ANSWSA-RP 12.06.01-
2003, Wiring Methods for Hazardous (Classified)
Locations Instrumentation — Part I: Intrinsic Safety.
disconnecting means conductors.
545.1 Scope. This article covers requirements for a manufactured building and building components as herein defined.
545.2 Definitions.
520, 525, and 530.
FPN: Rules that are followed by a reference in brackets contain text that has been extracted from NFPA 497-
2004, Recommended Practice for the Classification of
Flammable Liquids, Gases, or Vapors and of Hazardous
(Classified) Locations for Electrical Installations in
Chemical Process Areas. Only editorial changes were
made to the extracted text to make it consistent
with this Code.
(A) Excessive Dust and Dust with Water. Agricultural buildings where excessive dust and dust with water may accumulate, including all areas of poultry, livestock, and fish confinement systems, where litter dust or feed dust, including mineral feed particles, may accumulate.
FPN: For further information, see NFPA 75-2003, Stan- dard for the Protection of Information Technology Equipment.
250.102.
Exception: In Zone 22 locations, the bonding jumper shall be permitted to be deleted where all of the following conditions are met:
(1) Listed liquidtight flexible metal conduit 1.8 m (6 ft) or less in length, with fittings listed for grounding, is used.
(2) Overcurrent protection in the circuit is limited to 10 amperes or less.
(3) The load is not a power utilization load.