|
SYMBOLS
- 2
Note:- The marking of the symbols corresponding to IP numbers is optional.
| Amperes |
A
|
|
|
| Frequency (hertz) |
Hz
|
|
|
| Volts |
V
|
|
|
| Watts |
W
|
|
|
| Class II |
|
|
|
| Class III |
|
|
|
| Rated maximum ambient temperature |
ta ...
oC
|
|
|
| Warning against the use of cool-beam
lamps |
|
|
|
| Minimum distance from lighted objects (metres) |
|
|
|
| Luminaires with built-in ballasts
or transformers suitable for direct mounting
on normally flammable surfaces |
|
|
|
| Ordinary |
IP20
|
no symbol
|
|
| Drip-proof |
IPX1
|
|
(one drop) |
| Rain-proof |
IPX3
|
|
(one drop in square) |
| Splash-proof |
IPX4
|
|
(one drop in triangle) |
| Jet-proof |
IPX5
|
|
(two triangles with
one drop in each) |
| Watertight (immersible) |
IPX7
|
|
(two drops) |
| Pressure-watertight (submersible) |
IPX8
|
--m
|
(two drops and max
depth of submersion) |
| Protected against solid objects greater
than 2.5mm |
IP3X
|
no symbol
|
|
| Protected against solid objects greater
than 1mm |
IP4X
|
no symbol
|
|
| Dust-proof |
IP5X
|
|
(a mesh without
frame) |
| Dust-tight |
IP6X
|
|
(a mesh with frame) |
| Use of heat resistant supply cables, interconnecting
cables or external wiring |
|
|
|
| Luminaires designed for use with bowl mirror
lamps |
|
|
|
| Rough service luminaires |
|
|
|
| Luminaires with high pressure sodium lamps,
requiring an external ignitor |
|
|
|
| Luminaires for use with high pressure sodium
lamps having an internal starting device |
|
|
|
|
|
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