Coated sleevings are used to satisfy electrical, as well as, thermal, physical and chemical requirements. Generally, braided electrical insulating sleevings which have been continuously coated are characteristically identified with a temperature classification (thermal level at which sleeving can operate continuously) and a grade (defined through dielectric strength breakdown or puncture voltage) as follows:
Temperature Classification | DIelectric Strength Breakdown Voltage (Volts) | |||
C | Over 240°C | Grade | Minimum Average | Minimum Individual |
S | 240°C | A-1 | 7,000 V | 5,000V |
R | 220°C | B-1 | 4,000V | 2,500V |
H | 200°C | C-1 | 2,500V | 1,500V |
F | 155°C | C-2 | 1,500V | 800V |
B | 130°C | C-3 | No Dilectric Guarantee | |
Notes：(1) Conditioned for 96 hours at 23°C and 50% relative humidity (C-96/23/50) before testing. (2) For NEMA sleeving Types 3 | ||||