BS 31:1940 Specification. Steel conduit and fittings for electrical wiring (CF(EL) 9846) (PD 5663) (PD 6129) (AMD 248) (AMD 532) (AMD 5383) (Withdrawn)
Class A plain conduit; Class B, screwed conduit. Corresponding fittings; couplers, boxes, elbows, etc. Dimensions, test methods, details of gauges. See also BS 4568.
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