SIS Switchboard

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SIS switchboard wire is built for reliable performance in control panels, switchboards, and electrical equipment operating in dry environments. It features stranded copper conductors with cross-linked polyethylene (XLPE) insulation that delivers excellent heat resistance and electrical strength.

Rated for 600 volts, this wire meets UL 3173 requirements and passes the VW-1 flame test for sizes 14 AWG and larger. Its compact size and flexibility make installation easier, especially in dense panel wiring or confined enclosures. SIS wire is a dependable choice for internal power and control wiring where clean, organized connections and long-term reliability are critical.

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FAQs

SIS wire is made for internal wiring in panels, switchboards, and control cabinets. It’s rated 600V, heat-resistant, and easy to route in tight spaces thanks to its small size and flexible build.

No. SIS is designed for dry, indoor use only. For outdoor or damp environments, choose a tray-rated or THHN/THWN wire instead.

SIS has XLPE insulation and is built specifically for switchboard and panel wiring. THHN is more general-purpose and can be used in conduit and wet locations. Both are 600V, but they serve different applications.

Yes. All sizes 14 AWG and larger meet the VW-1 flame test and UL 44, so it holds up under heat and electrical load in enclosed equipment.

Not all options are listed online. Pro Wire & Cable can often locate additional colors, sizes, or stranded builds—just send a request via chat or the Contact Us page and we’ll check stock across partner warehouses.