ILSPB2-500 ILSCO – 4/0-500 MCM 2-Port Panelboard Lug

Yes — the ILSPB2-500 is dual-rated (AL/CU), meaning it accepts both aluminum and copper conductors ranging from 4/0 AWG up to 500 MCM. The tin-plated contact surface is specifically designed to provide a corrosion-resistant, low-resistance termination with aluminum wiring, which is common in Canadian feeder applications.

A 2-port lug has two independent conductor entry ports, each secured by its own bolt. This allows you to land two separate conductors simultaneously — useful for parallel feeder runs or sub-feed applications — provided each conductor falls within the 4/0–500 MCM range. Always verify that your panelboard's wiring diagram permits parallel conductors at that termination point.

The ILSPB2-500 uses a 1/4″ bolt size with 11/16″ hole spacing. You'll need to verify that your panelboard's lug boss or neutral/feeder terminal bar matches this bolt pattern. Panelboard lug compatibility varies by manufacturer and model. Send us your panelboard make and model number and we'll confirm whether this lug is the right fit — or help you find the correct ILSCO equivalent.