| Business Name | Address | |
| Cattaneo Electric Co | 8170 S Lemont Rd Darien, IL 60561 |
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| Frank Electric Co | 5716 Middaugh Ave Downers Grove, IL 60516 |
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| New Alliance Electric Co | 9s080 Landsfield Ave Downers Grove, IL 60516 |
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| Vanecek Electric Co | 1027 Palmer St Downers Grove, IL 60516 |
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| Reece Electric Inc | 124 Byrd Ct Clarendon Hills, IL 60514 |
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