Executive Summary
- Siemens, ITE, Murray and Gould panels draw from the same kit lineup. There’s no variation of breakers with Siemens.
- Start with where the main breaker sits. Having the main above both breaker columns will lead you to a different kit than a single row of breakers.
- Then check which way the handle throws, this is where Siemens orders go wrong. Several kits come in mirror-image pairs identical except for handle direction: K-4110 vs. K-4115, K-1210 vs. K-1210M, K-1215 vs. K-1215M.
- Canadian EQ loadcentres are covered too. the K-4510 fits 100–125 amp EQ loadcentres in single or three phase.
- Or skip all of it: text a photo of your panel with the breakers visible to (804) 400-5803 and we’ll reply with a link to the exact kit that fits.
Why Siemens, ITE, Murray, and Gould All Show Up Together
Siemens was founded in 1847 in Berlin, but the American side of the family tree runs through ITE Circuit Breaker Company, which Gould acquired in 1976 and sold to Siemens in 1983, and Siemens kept the ITE name rather than retiring it, because of the reputation it carried. Murray came under the same umbrella. Identification here is purely about geometry, position, gap, and throw direction, which also means an older panel is far more likely to have a kit than most homeowners expect.
Which Way Does the Handle Throw?
This step is crucial in determining the best fit. Note whether the main throws horizontally or vertically, then note which position is ON. Siemens produced an unusual number of mirror-image layouts and we build matching kits for them: the K-4110 fits a vertical main where ON is DOWN, while the otherwise identical K-4115 fits one where ON is UP. The K-1210 and K-1215 differ by which column the main sits on; their M variants differ again by which direction the handle engages. The K-1410 has a K-1411 counterpart for flipped mains.
Siemens, ITE & Murray Interlock Kits
Our kits are MET Listed, made in the USA with stainless steel hardware and laser-engraved safety markings.
What If My Panel Doesn’t Match the Table?
For feed-through panels rated 125 amp and down, the K-9011 fits a main in the top left and the K-9010 a main in the top right, and the K-9410 covers a 100–125 amp main with a gen breaker sitting on top of a stack. If you need breaker lockout capability, the K-1010 and K-4010/5 are also available as the lockable KL-1010 and KL-4010/5. And on newer equipment: Siemens moved to plug-on-neutral load centers in March 2020, and those PN and SN catalog numbers are covered. The K-4010/5 is listed for both pre- and post-2020 panels, and the K-1512 is built for 100A- 125A panels with a main centered in the panel above the breaker column.
What About Canadian Panels?
Covered. The K-4510 is built for EQ loadcentres in single phase or three phase, the Siemens residential line common in Canadian homes. It fits a 100–125 amp main that sits directly over the left breaker column with a horizontal throw and a 1″ gap down to the generator breaker, and it works in any 1″ gap between two two-pole breakers. The generator breaker installs directly below the main in spaces 1 and 3. The same kit also mounts to ITE, Murray, Cutler-Hammer, Eaton, Crouse-Hinds and Bryant panels, so it covers a lot of ground beyond Siemens alone.
Putting It All Together
If that feels like a lot, don’t worry about it: text a photo of your panel with the breakers visible to 804-400-5803 and we’ll identify everything for you and reply with a direct link to the exact kit that fits. Have a licensed electrician install it to the instructions and local code, and you have a safe, code-compliant way to back up your home with a portable generator. Browse the full Siemens interlock kit line, or read our companion guides for Square D panels and Eaton and Cutler-Hammer panels.
