Technical information

Under no circumstances may a tap conductor be derived from another tap

conductor. Derivations with reduced cross-sections can only be made directly

from the feeder.

5. Sockets and plugs

In North America a receptacles is also permitted as a switching device provided

that it follows these following requirements:

•The receptacle is single voltage

•The motor or load is not more than 2 Hp

•The sizing is less than 125% of the rated current of the motor or the load

•It is installed with a cable of no more than 6 m (20 ft) long

•The socket and plug conform in terms of the voltage and amperes with the

Nema Types defined in the NEC.

6. Fuses

Fuses are considered by many to be the best protection against short circuits.

The spread of fuses has lead to the need to establish construction standards,

something that NEMA (association of construction of electrical equipment) has

seen to.At present 13 different types of power fuses are recognized (that are

FEEDER AND BRANCH CIRCUITS

Maximum 10 ft

(3.05 mt)

Between 10 ft and

25 ft (7.63 mt.)