MODUK DEF STAN 61-12: PART 1 PDF

The cords and cables listed in this standard are designated by the rated voltages Uo and U expressed in the form Uo/U where:

Uo is the power-frequency voltage to earth for which the item is designed, and

U is the power-frequency voltage between conductors for which the item is designed.

The flexible cords and flexible cables listed in the standard range are suitable for operation in the following conditions:

Where the combination of ambient temperature and temperature rise due to load results in a conductor temperature not exceeding:

85oC for the items in Table 1

60oC for the items in Table 2 and Table 5

70oC for the items in Table 3.

Where in the case of short circuit, the maximum conductor temperature does not exceed:

250oC for the items in Table 1

200oC for the items in Table 2 and Table 5

160oC for the items in Table 3.

Current ratings have not been shown in the tables because of the wide ranges of conditions in which the item may be used. Current ratings according to the conditions of use may be obtained from IEE Regulations for the electrical equipment of the building.