Materials ComEd Uses Flashcards
What size wire is used for a pole ground?
copperweld 7 (#2 str)
What size cutout is used for single phase distribution transformers ranging 10KVA - 100KVA?
100 amp fuse cutout
What wire size is typically used for the high side of a 100 amp fuse cutout?
4 sol copper
What dead-end is used in conjunction with a strain insulator?
Inline clamp or inline shoe, rigid dead-end
What is the proper connection for connecting 2 wires together?
Ampact connection
What size secondary is used in conjunction with a 4 conductor service head?
4C 477
4C 4/0
4C 1/0
What arrester is used for a 12kV distribution down-feed pole?
10KVA riser arrester
What is the proper bolt application when dead-ending a system neutral or service to the pole?
Thimble-eye bolt or double dead-end bolt and thimble-eye nut
What is the proper tie wire for a radio free glaze insulator?
Preform tie wire or hand tie (skinned or bare)
What is the correct arrester for 4kV distribution construction?
3KVA
What is the correct formula to determine pole depth?
10% of pole size plus 2’
If you’re dispatched to an emergency outage and hear generators, what should be your primary concern?
Potential backfeed
What is ComEd’s most commonly used LSM or secondary bus?
3C 4/0 triplex
What is a double arm (DA) bolt’s primary use?
For double arms
What are compression sleeves used for?
Repairing damaged or down primary conductors and secondary neutrals.
What should you do if you encounter an open system neutral?
Put on your 20KVA gloves.
What disconnects and fuses does ComEd use on its system?
600 amp disc
300 amp solid blade
SMU fuse disc
100 amp fuse disc
Trip saver
What various size types of copper are used on ComEd’s system?
500 cu
250 cu
1/0 cu
2 str cu
4 sol cu
6 sol cu
What primary aluminum conductor size types are used on ComEd’s system?
477 al
4/0 al
1/0 al
What are the 2 most commonly used residential service wires on ComEd’s system?
1/0 al
#4 sol al
