§ 39.243. Arrangement and identification.
(a) Connections, wiring and equipment of switchboards and panelboards shall be arranged in an orderly manner and switches and cut-outs shall be plainly marked, labeled or arranged so as to afford ready means for identifying circuits or equipment supplied through them.
(b) A diagram of switchboard or panelboard connections and devices should be kept posted in some convenient place near such equipment.
(c) Switchboards shall have current-carrying parts which are ordinarily isolated or guarded, but which may occasionally require adjustment or repair while alive, so arranged that suitable portable covers or shields may be effectively placed to protect workmen from contact with any neighboring live parts.
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