| Frequency |
| Advanced Power & Controls LLC | http://www.advancedpowercontrols.com |
| Frequency |
| Behlman Electronics Inc. | http://www.behlman.com |
| Frequency |
| Falcon Electric Inc. | http://www.falconups.com |
| Frequency |
| Georator Corp. | http://www.georator.com |
| Frequency |
| Triatek Inc. | http://www.triatek.com |
| Frequency |
| Unitron LP | http://www.unitronlp.com |
| Hydronic |
| National Energy Control Corp. | http://www.neccdelivers.com |
| Phase |
| Eylander Electric Inc. | http://www.eylanderelectric.net/phase-convertors-transfer-switches |
| Phase |
| Falcon Electric Inc. | http://www.falconups.com |
| Phase |
| Kay Industries Inc. | http://www.kayind.com |
| Phase |
| Phase-A-Matic Inc. | http://www.phase-a-matic.com |
| Phase |
| Ronk Electrical Industries | http://www.ronkelectrical.com |
| Power |
| Georator Corp. | http://www.georator.com |
| Power |
| Neeltran | http://www.neeltran.com |
| Power |
| Ronk Electrical Industries | http://www.ronkelectrical.com |
| Power |
| Triatek Inc. | http://www.triatek.com |
| Rotary |
| Eylander Electric Inc. | http://www.eylanderelectric.net/phase-convertors-transfer-switches |
| Rotary |
| Georator Corp. | http://www.georator.com |
| Rotary |
| InterBuilMat Inc | http://www.interbuilmat.com |
| Rotary |
| Ronk Electrical Industries | http://www.ronkelectrical.com |
| Static |
| Eylander Electric Inc. | http://www.eylanderelectric.net/phase-convertors-transfer-switches |
| Static |
| Georator Corp. | http://www.georator.com |
| Static |
| Ronk Electrical Industries | http://www.ronkelectrical.com |