Electric Wiring, 3rd Edition

130 Installation of conduit systems

Bending and setting conduit

Conduit runs often pass from one direction to another not at right angles to

the first, or small changes of

level

may be necessary. When surface conduit is

used in conjunction with iron-clad switchgear and distribution boards, a

small set-off of the conduit is required to make a secure mechanical and

electrical contact with the equipment. In these cases, the conduit must be

bent.

A bending block or machine is used for bending and making set-offs in

conduit of larger

sizes,

such as

20

mm, 25 mm and above (see

Figs.

8.15 and

8.19). A bending block consists of a small baulk of timbe ...