ON STAGE 400P (serv.man4) - JBL Audio EMC - CB Certificate (repair manual). Page 73

 

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Report No.  100711 

 

 
 

 

Add the following terms. 

Equipment, Class 0I  

1.2.4.101 

Material, VTM  

 

1.2.12.101 

Considered. 

 

 

CLASS 0I EQUIPMENT: Equipment where protection 
against electric shock is achieved by: 

a) using BASIC INSULATION, and 

b) providing a means of connecting to the protective 
earthing conductor in the building wiring those 
conductive parts that are otherwise capable of 
assuming HAZARDOUS VOLTAGES if the BASIC 
INSULATION fails, and 

c) using a supply cord without earthing conductor and 
a plug without earthing wire although the equipment 
has externally an earth terminal or a lead wire for 
earthing. 

Equipment provided with a cord set having a two-pin 
type plug with a lead wire for earthing is also regarded 
as Class 0I. 

NOTE – Class 0I equipment may have a part 
constructed with Double Insulation or Reinforced 
Insulation as well as an operating part as SELV circuit.

Class III equipment. 

N 

 

FLAMMABILITY CLASSIFICATION OF MATERIALS: 
The recognition of the burning behaviour of materials 
and their ability to extinguish if ignited. Materials are 
classified as in 1.2.12.2 to 1.2.12.9, and 1.2.12.101 
when tested in accordance with annex A. 

NOTE 1 - When applying the requirements in this 
standard, HF-1 CLASS FOAMED MATERIALS are 
regarded as better than those of CLASS HF-2, and 
HF-2 better than HBF. 

NOTE 2 - Similarly, other MATERIALS, including rigid 
(engineering structural) foam of CLASSES 5V or V-0 
are regarded as better than those of CLASS V-1, V-1 
better than V-2, and V-2 better than HB. 

NOTE 3 - Similarly, for thin MATERIALS, VTM-0 Class 
materials are regarded as better than those of VTM-1 
Class, and VTM-1 better than VTM-2. 

Considered.