Class |
Insulating Material |
Impregnation Material |
Max. Continuous Temperature |
Cable Type |
Y |
Cotton, Synthetic and natural silk, Polyamide fibers, Paper, Polyvinylchloride (PVC), Polyethylene (PE), Vulcanized rubber |
- |
90°C |
European PVC + Neoprene cables |
A |
Cotton, Synthetic and natural silk, Polyamide, Paper, heat-resistant impregnated textiles, Polyester resin |
Bitumous varnish Synthetic resin varnish Insulating oil and synthetic di-electrical fluids |
105°C |
HELUTHERM® single conductors, control cables UL + CSA-approved |
(E) |
Special wire enamel, Special synthetic foils, Compressed material with cellulose fillers, Paper and cotton tapes |
Synthetic resin varnish and Polyester resin, both with a permissible continuous withstand temperature of > 120°C |
105°C (short time operation 120°C) |
HELUTHERM® 120 |
B |
Glass fiber, Mica products, Special synthetic foils, Compressed materials with mineral fillers |
As under E but with a permissible continuous withstand temperature of > 130°C |
145°C |
HELUTHERM® 145 |
F |
Glass fiber, Mica products, Aromatic polyamides, Impregnated glass fiber braids |
Resins with a permissible continuous withstand temperature of > 155°C |
155°C |
HELUTHERM® 145 |
H |
Glass fiber, Mica products, Aromatic polyamides, Silicone rubber, Polyamide foils, PTFE |
Silicone resins with a permissible continuous withstand temperature of > 180°C |
180°C |
Silicone + HELUFLON® tinned conductors |
C |
Mica, Porcelain, Glass, Quartz, and similar fire resistant materials |
As under H but with a permissible continuous withstand temperature of > 225°C |
> 180°C |
HELUFLON® PTFE+FEP with tinned or nickel plated conductors, HELUTHERM® 400/600/800/1200 |