BEC follows the range of service voltages in use by the American National Standards Institute (ANSI) for Electric Power Systems and Equipment C84.1-1989. The term “service voltage” is defined as the point where BEC's electrical system connects with that of a member.
ANSI Standard C84.1
| Nominal Service Voltage | Desirable Range | Acceptable Range |
|---|---|---|
| Requires that occurrences of service voltage outside range are infrequent. | Occurrences outside the desirable range resulting from practical design or operating conditions that are limited in extent, frequency, and duration. | |
| 120 | 126 to 114 | 127 to 110 |
| 208 | 218 to 197 | 220 to 191 |
| 240 | 252 to 228 | 254 to 220 |
| 277 | 291 to 263 | 293 to 254 |
| 480 | 504 to 456 | 508 to 440 |