1) Same as the Basic requirements mentioned above.
2) Any of the following shall be considered to comply with this requirement.
a) Connectors are constructed in such a way to prevent incorrect wiring or improper connection.
b) Proper connection of terminals and wires are signified by means of color coding, symbols, etc.
3) Equipment for facilities and other installations, which incorporates no overcurrent protection devices, shall be considered to comply with this requirement if the following condition is satisfied.
a) Users are instructed to install dedicated overcurrent circuit breakers or manual switches (equipped with a fuse) in the work instructions, and the overcurrent circuit breakers or manual switches (equipped with a fuse) are actually installed.
4) Equipment incorporating protective devices (current-limiting fuses, overcurrent protection devices, etc.) against a short circuit between poles of the power supply shall be considered to comply with this requirement.
(See Fig. 1 and 2.)