Translations:Conductor types/8/en

These classifications should be printed on the side of any wire or cable, although the exact terminology may vary based upon location. Below are some of the designations that are commonly used for wires used in off-grid PV systems.

Classification	Common designation
Maximum insulation voltage	600 V, 1000 V, 2000 V
Heat resistance	60°C, 75°C, 90°C
Durable thermoplastic insulation	T
Synthetic polymer, flame-resistant	X
R	Rubber or Neoprene insulation
Heat resistant up to 75°C	H
Heat resistant up to 90°C	HH
Rated for use in wet locations	W
Nylon-coated to resist damage from oil or gasoline	N