Year: 2026

If your project crosses the border into Canada — or you’re specifying for a Canadian contractor — you’ll run into the RW​ family: RW75, RWU75, and RWU90. These are CSA C22.2 No.38 + UL44 single-core cables, 600V/1000V, XLPE insulation over bare copper (or aluminum) conductors. They look alike on a cut sheet, but the three […]

If you’re specifying building wire under UL 44​ and NEC Table 310.15, you’ve likely encountered the XHH family: XHH, XHHW, and XHHW-2. They look similar on a quote — all use XLPE (cross-linked polyethylene)​ insulation, no PVC jacket, 600V (with 1 kV common for photovoltaic feeders) — but the three-letter suffixes decide whether your run […]

When specifying building wire for North American commercial or industrial projects, three common UL44 types often cause confusion: RHH, RHW, and RHW-2. They share the same basic construction — stranded copper or aluminum conductor with EPR (ethylene propylene rubber) or XLPE (cross-linked polyethylene) insulation, no PVC jacket, rated 600V (also available 1000V/2000V) — but differ […]

When selecting building wire for Canadian electrical installations, understanding the distinction between T90​ and R90​ is essential. Both are rated 90°C and comply with Canadian Standards Association (CSA) requirements, yet they serve fundamentally different applications due to their insulation materials and structural design. This article provides a detailed side-by-side comparison of T90 and R90, covering […]