07-01-13
VOLTAGE - SERVICE
Availability
ER 22-500-C
PAGE 1 OF 2
USE: Service voltages (600 volts or less, 60 hertz, A.C.) available for permanent service.
PREVIOUS REVISION
01-01-11
ORIGINATED
03-94
PREVIOUS NUMBER
ER 16-000, 02-01-78
Latest Revision: Added 240 volt, 3 wire, three phase service to underground service from underground source.
SPECIFICATION:
1. GENERAL:
1.1 Inquiry shall be made at the nearest Company office to ascertain the form of service than can
be obtained at any particular location.
1.2 In the following, an underground source is defined as one in which services are taken from
pad-mounted transformers. An overhead source is defined as one in which service are taken
from transformers mounted on poles.
2. OVERHEAD SERVICE, 10/:
2.1 120 volts, 2 wire
2.2 240 volts, 2 wire
2.3 120/240 volts, 3 wire
2.4 240/480 volts, 3 wire
3. OVERHEAD SERVICE, 30/:
3.1 120/208 volts, 4 wire
3.2 240 volts, 3 wire
3.3 277/480 volts, 4 wire
3.4 480 volts, 3 wire - Available but not recommended due to possibility of high induced voltage
accompanying an arcing fault current.
DENOTES REVISION
NORTHERN INDIANA PUBLIC SERVICE COMPANY
07-01-13
ER 22-500-C
PAGE 2 OF 2
VOLTAGE - SERVICE
Availability
4. UNDERGROUND SERVICE, 10/, FROM UNDERGROUND SOURCE:
4.1 120 volts, 2 wire
4.2 240 volts, 2 wire, ungrounded only
4.3 240/120 volts, 3 wire
4.4 480/240 volts, 3 wire
5. UNDERGROUND SERVICE, 10/, FROM OVERHEAD SOURCE:
5.1 120 volts, 2 wire
5.2 240 volts, 2 wire
5.3 120/240 volts, 3 wire
5.4 240/480 volts, 3 wire
6. UNDERGROUND SERVICE, 30/, FROM UNDERGROUND SOURCE:
6.1 208Y/120 volts, 4 wire
6.2 240 volts, 3 wire
6.3 480Y/277 volts, 4 wire
6.4 480 volts, 3 wire - Available but not recommended due to possibility of high induced voltage
accompanying an arcing fault current.
7. UNDERGROUND SERVICE, 30/, FROM OVERHEAD SOURCE:
7.1 120/208 volts, 4 wire
7.2 240 volts, 3 wire
7.3 277/480 volts, 4 wire
7.4 480 volts, 3 wire - Available but not recommended due to possibility of high induced voltage
accompanying an arcing fault current.
DENOTES REVISION
NORTHERN INDIANA PUBLIC SERVICE COMPANY