NIGP 28508: Bus Bars, Duct, and Accessories

NIGP 28508 Bus Bars, Duct, and Accessories is an Item code covering aluminum tubing, bus supports, clamps, and related electrical infrastructure components for utility substations and distribution systems. State and local governments procure this code primarily through city utilities and special districts that manage electric substations, with solicitations typically issued as small-quantity quotations or competitive sealed-bid contracts. The work involves sourcing materials to exact electrical and metallurgical specifications — seamless aluminum tubing to ASTM standards, clamp bus supports with precise dimensional and load ratings, and accessories meeting utility-grade conductivity and bend-radius requirements. Delivery location and lead time are often evaluation factors, and specifications frequently mandate approved-manufacturer lists with part-number precision.

Recent activity shows concentration in Texas utilities. The City of Austin Purchasing Office issued two quotations in October 2026: IFQ 1100 AGM1027 for bus pipe (546 feet of 2.5-inch aluminum seamless tubing and 1,170 feet of 4-inch pipe, due October 19, 2026, with SBE/M/WBE priority), and IFQ 1100 CPG1089 for clamp bus supports (100 units of 5-inch bus head clamps for 4-inch IPS aluminum tubing, due October 14, 2026, also SBE/M/WBE-tiered). Northside Independent School District in San Antonio posted IFB 2026-098 in June 2026 for general electrical equipment, parts, supplies, and services with a July 1, 2026 response date. Sourcewell, acting on behalf of Washington state counties including Franklin, Grant, Grays Harbor, Chelan, and Yakima, issued RFP 061626 for Law Enforcement Equipment (due June 16, 2026), which may include a bus-bars or electrical-accessories component depending on final scope. Pricing submissions require FOB Destination terms with freight and handling included in unit prices, and municipal tax exemptions must be honored by offerors. Both Austin quotations used tiered vendor outreach, beginning with certified small or minority/women-owned vendors and opening to all registered vendors if adequate quotes were not received from priority groups.