Mechanical Lug Sizing by Panel Brand: Square D, Siemens, Eaton, GE (2026)
Apr 04, 2026
When you need to replace a mechanical lug in a panel, the panel manufacturer's documentation tells you the accepted wire range and stud size — but it doesn't tell you where to buy a replacement at a reasonable price. This guide gives you the lug specifications for every major residential and commercial panel brand so you can order the right Conversions Tech replacement directly.
Residential main lug sizing
| Panel | Amps | Main Lug Wire Range | Stud | CT Lug |
|---|---|---|---|---|
| Square D QO | 100A | #8 to #2 AWG Cu/Al | 1/4" | 210-99003 |
| Square D QO | 200A | #6 to 4/0 AWG Cu/Al | 3/8" | 210-99006S |
| Square D Homeline | 100A | #8 to #2 AWG Cu/Al | 1/4" | 210-99003 |
| Square D Homeline | 200A | #6 to 300 MCM Cu/Al | 3/8" | 210-99006S |
| Siemens P1/PL | 100A | #14 to #2 AWG Cu/Al | 1/4" | 210-99003 |
| Siemens P1/PL | 200A | #6 to 300 MCM Cu/Al | 5/16" | 210-99005 |
| Eaton BR | 100A | #8 to #2 AWG Cu/Al | 1/4" | 210-99003 |
| Eaton CH | 200A | #6 to 4/0 AWG Cu | 3/8" | 210-99006S |
| GE PowerMark | 100A | #8 to #2 AWG Cu/Al | 1/4" | 210-99003 |
| GE PowerMark | 200A | #6 to 300 MCM Cu/Al | 5/16" | 210-99005 |
| Leviton LP | 200A | #6 to 300 MCM Cu/Al | 3/8" | 210-99006S |
Commercial panelboard main lugs
| Panel | Amps | Wire Range | Stud | CT Lug |
|---|---|---|---|---|
| Square D NQ | 225A | 1 AWG to 300 MCM | 3/8" | 210-99006S |
| Square D NF | 400A | 4/0 to 500 MCM | 1/2" | 99011A |
| Siemens S1 | 250A | 1/0 to 350 MCM | 3/8" | 210-99006S |
| Eaton PRL1a | 400A | 4/0 to 500 MCM | 1/2" | 99011A |
| GE A-Series | 225A | 1 AWG to 300 MCM | 5/16" | 210-99005 |
Safety switch / disconnect lugs
| Switch | Amps | Wire Range | CT Lug |
|---|---|---|---|
| Square D HU361 | 30A | 14-8 AWG | 210-99001B |
| Square D HU362 | 60A | 14-6 AWG | 210-99001B |
| Square D HU364 | 200A | 6 AWG-300 MCM | 210-99006S |
| Eaton DH362 | 60A | 14-6 AWG | 210-99001B |
| Eaton DH364 | 200A | 6-250 MCM | 210-99005 |
| Siemens HF362 | 60A | 14-6 AWG | 210-99001B |
Why order replacement lugs from Conversions Tech?
OEM replacement lugs from panel manufacturers are expensive — a single Square D replacement lug kit can cost $15-30 for a basic mechanical lug that costs us $1.10 to $6.05. Our mechanical lugs are UL listed, accept the same wire ranges, and mount with the same stud bolts. For electricians doing panel upgrades, service calls, or new construction, the savings on lugs alone can pay for your entire tool kit.
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