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SYMBOLS - 2 - Printable .PDF version
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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