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Wire Sizing Chart For Breaker- Reference - CSA C22.2, NO. 5-02,
Table 6.1.4.2.1, UL 489.
TABLE 1
Current (AMPS)
Terminals - Connection Devices
TABLE 2
Purpose
Lug ILSCO TA-250
Conductor Range
250 kcmil - 6 AWG
Electrical Testing
All wiring must be checked and tested to ensure all circuits are according to plan and there are no unwanted opens, shorts or grounds. Do not power
to the panel until the following steps are completed:
• Test each circuit to verify correct phasing and ground connections.
• Test each circuit for insulation resistance by merge ring, high voltage or hi-pot test; Be sure the system does not have any short
circuits or unwanted grounds.
• If any circuit displays a resistance to another circuit or to ground of One Mega ohm or less, that circuit must be analyzed, corrected
and tested to more than One Mega ohm before applying power.
• Perform these tests with circuit breakers in both the "ON" and "OFF" conditions.
• Once it has been determined that all Load and Line circuits are satisfactory, the next steps of installation may be completed.
• Check the terminals and connectors for looseness or signs of overheating.
• Overheating will show as discoloration, melting, or blistering of conductor/connector insulation, or as pitting or melting of
conductor surfaces due to arcing.
• If there is evidence of overheating, terminations should be cleaned or replaced.
• Before re-energizing the panel, all terminations and cables should be refurbished to the condition when originally installed.
Appleton • 1.800.621.1506 • www.appletonelec.com
15A OR LESS
20A
25A-30A
40A-50A
60A
Conductor Size (UL/CSA)
1/0 AWG
Bolt/Stud Size
5/16
TIGHTENING TORQUE VALUES FOR ILSCO SOCKETHEAD SCREW CONNECTORS
Internal Socket Size
Across Flats in Inches
5/16
Conductor Strip Length
0.85"
Standard Package
25
INFORMATION SHEET
Tightening Torque in Inch Pounds
275
Required WIRE SIZE
14 AWG
12 AWG MINIMUM
10 AWG MINIMUM
8 AWG MINIMUM
6 AWG MINIMUM
Max. Amps
Pressure Screw Torque
150 A
Item ID
NAED/UPC Number
TA-250
0783669889420
504483-000 Rev. B 10/08/18 • Page 10 of 16
275 in-lbs.
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