Siemens WSP3 Bussed Extension Box Indoor Outdoor NEMA Type 3R

Siemens WSP3 Outdoor Bussed Extension is a 1200 A maximum, 240 V, three‑phase, four‑wire extension box engineered to extend Siemens bused power distribution in both indoor and outdoor environments, with a NEMA Type 3R enclosure suitable for weather‑exposed locations. The unit measures 7-1/4 in. long by 12 in. high by 6-1/4 in. wide, and is designed to slot into Siemens bussed extension layouts where additional bus length or feeder positions are required. As part of Siemens' WSP family of bussed extension components, it supports high‑current distribution up to 1200 A at 240 VAC and is intended for outdoor service entrance configurations or rear‑connected switchgear in commercial and industrial facilities. The NEMA 3R rating provides protection against rain and ice exposure, making it suitable for exterior installations such as outdoor distribution points or remote power zones where weather resistance is essential. This extension box enables modular expansion of low‑voltage distribution without replacing existing enclosures, contributing to scalable, safe power delivery in environments that demand durable outdoor‑rated electrical infrastructure.