THHW-LS
3 coding systems recognise this code
NOM / NMX (Mexico)
| Symbol | Meaning |
|---|---|
T | Thermoplastic (Termoplastico) insulation |
HH | Resistant to high heat, 90 C (Resistente al calor alto) |
W | Resistant to water (Resistente al agua) |
LS | Low smoke emission (Baja emision de humos); PVC-LS is flame-retardant, low smoke, low HCl, not halogen-free |
THHW-LS | Thermoplastic high-heat water-resistant low-smoke building wire (Mexico). 600 V, 90 C (Viakon page: 90 C wet and dry). NOM-063-SCFI; NMX-J-010-ANCE |
NEC / UL (USA)
| Symbol | Meaning |
|---|---|
T | Thermoplastic (PVC) insulation |
HH | High heat resistant, 90 C range (two H) |
W | Approved for wet locations |
THHW | Thermoplastic high heat-resistant, moisture-resistant building wire. 600 V, 90 C dry, 75 C wet. UL 83; NEC Article 310 |
NBN
| Symbol | Meaning |
|---|---|
T | Telephone Cable |
H | Resistant To Humidity |
H | Resistant To Humidity |
W | Polyethelene (PE) |
L | Lead Sheath |
S | Fine-Wired For Fixed Installations-Class 5 |