Distribution

Once the electricity is distributed to substations across New Brunswick by the transmission lines, the "step down" mode begins. There are 13 substations in the Saint John area where the voltage is decreased by power transformers to either 4,160 or 12,470 volts. At the distribution substation, the bulk power received is metered and sent out over numerous distribution lines throughout various areas of the city.

The voltage carried in the power lines around the city is still too high to safely use in our homes, so it is reduced once again. It is reduced at either pad mount or pole mount transformers. Pad mount transformers can be found on the ground, where underground power lines exist, while pole mount transformers are on the utility poles for power lines above the ground. Lines from these transformers to the customer are called service loops.

Electricity is usually delivered from the transformers to individual homes (through service entrances) at 120/240 volts. Industry, stores, schools, hospitals and other large electricity consumers require larger transformers, larger service entrances, and may require different voltages, including 120/208 volts and 347/600 volts.

 

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