INFORMATION & REQUIREMENTS ELECTRIC SERVICE - NStar

SKETCH 13
Minimum Clearances For All Self-Contained Meter Socket Installations
SKETCH 14
Residential or Small Commercial Meter Pedestal Installation For
120/240 Volt, 400 Amperes or Less Service
1" MINIMUM
OVERHANG
OF PLYWOOD
AROUND
TROUGH
EXPANSION
JOINTS REQUIRED
3'
HORIZONTAL SOCKETS
OR BANKS INDOORS
1. A clear working space area of 3 feet is required in all directions around
the front of all meters, and/or metering cabinets and equipment as
required by Massachusetts Electrical Code to allow reading, testing,
and repairing or replacing of such equipment.
2. All gas meters and associated equipment must be a minimum of 3 feet
from the electrical service and metering equipment.
3. The 8 inch horizontal clearance must be maintained from an adjacent
wall or from any equipment mounted on the wall.
4. Vertical & horizontal clearances between meters must be maintained
when sockets are installed.
5. Taps to 5th terminal to be installed by contractor with a #12 solid
copper or #10 solid aluminum AWG conductor depending on service
conductor, insulated in a white jacket.
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1. The entire pedestal including meter socket and service conductors furnished are
owned and maintained by the customer.
2. A clear work area of three feet is required in all directions of the meter pedestal.
3. All terminal boxes to be sized per the Massachusetts Electrical Code
(if applicable).
4. Pedestal must maintain a minimum clearance of 4 feet from utility poles, and
transformers.
5. The 3/4 inch pressure treated or equal plywood panel board shall be sized to
accommodate the meter socket, a terminal box and service disconnect device
(if applicable).
6. A service disconnect may be required in accordance with Massachusetts Electric
Code. If a service disconnect is being installed, it is subject to the following:
a. Installation is subject to the authority having jurisdiction.
b. It shall be installed on the line side of the meter.
c. The bottom of the disconnect switch shall be physically mounted no lower
than three feet from the finished grade.
7. Installation of pedestal subject to the approval of the authority having
jurisdiction.
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