Day: June 27, 2026

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 […]

When planning an electrical installation, one of the most critical decisions you will make is selecting the right conductor material for your THHN wire. While both copper and aluminum AA8000 series THHN wires share the same robust outer construction—PVC insulation with a nylon jacket, rated for 600V and 90°C in dry locations—their internal differences are […]