Lamp clearance and creepage distance reference table

Creepage distance and clearance

Class 0 and I lamps

Class II lamps

Class III lamps

Working voltage ( V ) (not exceeding)

twenty four

250

500

1000

twenty four

250

500

Between different live parts

2

3

4

6

2

3

4

2

Creepage distance between live parts and accessible metal parts, or on accessible surfaces of live parts and externally insulated parts (if it is an insulating material, it may be the outer surface of the luminaire)

gap

2

2

4

3

5

5

6

6

2

2

8

8

10

10

2

2

Between a live component and an accessible metal component due to the destruction of functional insulation in a Class II luminaire

-

-

-

-

2

4

5

-

Between the outer surface of the flexible cord or the flexible cable and the accessible metal, the accessible metal is secured by a corded knot made of an insulating material, a cable support or a clamp

-

-

-

-

-

4

5

-

After removing the insulating gasket (if any) near the switch, it is installed between the live parts of the switch and the adjacent metal parts.

-

2

-

-

-

4

-

-

Between the live parts and other metal parts, there is no such thing as between these parts (or live or uncharged metal parts) and the support surface (ceiling, wall table, etc.):

a.        Power supply insulation is less than 2.5mm

b.        Through thickness is not less than 2.5mm Insert metal for the seal

2

-

6

4

8

6

10

8

2

-

8

6

10

8

2

-