⚡ QUESTION OF THE WEEK (2026)
A service consists of three separate service-disconnect enclosures, and each enclosure is supplied by a different size set of ungrounded service-entrance conductors. According to 2026 NEC 250.28(D), how must the main bonding jumper in each enclosure be sized?
🔎 Study Challenge: Don't just look it up — find the information you need in the NEC first. Look for:
- The specific rule for sizing main bonding jumpers when multiple service-disconnect enclosures have different conductor sizes.
- The table used to determine the minimum size of the main bonding jumper based on the ungrounded conductors.
💬 Comment your answer and identify the NEC section(s) or table(s) you used.
⚡ 2026 NEC FastTraxTube.com
⚡ Study Credit: TRADEHOG.NET
⚠️ Educational question. Verify applicable requirements using the NEC edition and local amendments.
(A) Is correct as When a service consists of separate disconnect enclosures supplied by different conductor sizes, each enclosure gets its own individual main bonding jumper sized to the ungrounded conductors supplying that specific enclosure 250.28(D)(2)