GUIDES, CHARTS & CHEAT SHEETS
Resources for People Working on Real Panels
Cross-reference charts, sizing tables, nameplate decoders and enclosure ratings - written by the counter staff who answer these questions on the phone all day. No gated PDFs and no lead-capture wall.
MOST READ CROSS-REFERENCE
How to Identify an Obsolete Circuit Breaker From Its Nameplate
Every number on the label, what it actually tells you, and which four figures a distributor needs before anyone can quote a replacement.
9 min read - Updated August 2026
Start with what you're trying to do
2 GUIDES
Identify a part I can't look up
Nameplate decoding and legacy-to- current cross-reference charts for discontinued frames.
Cross-reference guides →
2 GUIDES
Size or specify the right part
NEMA starter sizing, fuse classes, transformer kVA and enclosure ratings.
Sizing guides →
2 GUIDES
Satisfy an inspector
What the standards require of reconditioned gear, and the documentation to have ready.
Code & compliance →
2 GUIDES
Diagnose something failing
Tripping breakers, chattering starters, welded contacts - what the symptom actually indicates.
Troubleshooting →
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