Incandescent lamps - Safety specifications - Part 1: Tungsten filament lamps for domestic and similar general lighting purposes

This Standard applies to the safety of tungsten filament lamps intended for use in lighting equipment, designed to be installed on branch circuits not exceeding 750 V and used in accordance with the rules of the Canadian Electrical Code (CEC), Part I.

Note: Manufacturers designing products for use in Canada may find a helpful summary of the equipment-related requirements of the CEC, Part I, in CSA Publication SPE-2000.

International Standard IEC 432-1 specifies the safety and interchangeability requirements of tungsten filament incandescent lamps for general lighting service having:

- rated wattage up to and including 300 W;
- rated voltage of 50 V to 250 V inclusive;
- bulbs of the A, B, C, G, M, P, PS, PAR or R shapes, or other bulb shapes where the lamps are intended to serve the same purpose as lamps with the foregoing bulb shapes;
- bulbs with all kinds of finishes;
- caps E12, E17, E26/24 single-contact, E26d double-contact, or E26/50x39 skirted medium screwbase.

See IEC 887 for description of the letter symbols. Associated traditional names are:

- Pear shape= A, PS
- Mushroom= M
- Candle= B, C (in North America)
- Round bulb= P
- Globular= G
- Reflector= R
- Parabolic reflector= PAR

Note: In Canada the requirements for E12 and E17 are non-mandatory.