You can see a PSNH transmission substation in just about every community we serve. It’s the mission-critical equipment that serves to reduce incoming transmission line voltage levels down to levels that can be safely used in your home or business.
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Public Service of New Hampshire (PSNH). P.O. Box 330 Manchester, New Hampshire, 03105-0330 U.S.A. Telephone: 1-800-662-7764 or our TTY/TDD number 1-800-346-9994