3M
™
Shearbolt Connectors
QCI Series
Instructions
F
CAUTION
Working around energized systems may cause serious injury or death.
Installation should be performed by personnel familiar with good safety practice
in handling electrical equipment. De-energize and ground all electrical systems
before installing product.
Connector
Outside Diameter
Typical Length
w/Centering Rings
QCI 2-250
1.10" (28 mm)
4.41" (112 mm)
QCI 1/0-350
1.30" (33 mm)
5.12" (130 mm)
QCI 4/0-600
1.50" (38 mm)
5.75" (146 mm)
QCI 350-750
1.65" (42 mm)
6.93" (176 mm)
QCI 500-1000
2.05" (52 mm)
7.83" (199 mm)
QCI 1000-1250
2.10" (53 mm)
8.25" (210 mm)*
* No centering rings used with this connector.
3
August 2012
78-8127-9877-1-D
Kit Contents
1 3M
™
Shearbolt Connectors QCI
(includes centering rings as appropriate)
1 3M
™
Foil Tape Connector Wrap 1115B
1 Instruction Sheet
1.0 Notes
1.1 Unless the 3M
™
Shearbolt Connector is supplied
with a cable accessory kit, always check with the
cable accessory manufacturer to make certain that
the shearbolt connector will work properly with the
accessory before installing the connector.
1.2 Do not remove bolts from the connector.
1.3 These shearbolt connectors can be used with both copper
and aluminum conductors.
1.4 These shearbolt connectors can be used to join
conductors of equal size or different sizes, provided that
both conductors are within the range of the connector.
1.5 The connector is pre-greased. Do not remove the
connector grease.
1.6 These connectors are designed to be used in 3M
™
Cold
Shrink QS-III Splices. Check with other manufacturers
before using with their splice kits.
2.0 Insulation Cutback Dimensions
2.1 Prepare the cable cutbacks per the accessory
manufacturers instructions. The ends of the conductors
must be square cut. Using your QCI connector number,
remove the cable insulation length shown in the
following table.
Connector
Insulation Cutback
QCI 2-250
2.00" (51 mm)
QCI 1/0-350
2.75" (70 mm)
QCI 4/0-600
3.0" (76 mm)
QCI 350-750
3.50" (89 mm)
QCI 500-1000
3.75" (95 mm)
QCI 1000-1250
4.125" (105 mm)
2.2 Use the following table and your conductor size to
determine the appropriate connector centering ring.
Install the centering ring, unless conductor size
indicates “No ring,” by screwing the ring clockwise
into the connector end. For size transitions, use the ring
appropriate to each conductor size.
Connector
Conductor Size
(AWG, kcmil)
Connector Centering
Ring Color
QCI 2-250
2-1/0
Grey
2/0–3/0
Black
4/0–250
No ring
QCI 1/0-350
1/0–2/0
Blue
3/0–4/0
Black
250
White
350
No ring
QCI 4/0-600
4/0
Blue
250
Black
350
White
500–600
No ring
QCI 350-750
350
White
500–750
No ring
QCI 500-1000
500
White
750-1000
No ring
QCI 1000-1250
1000-1250
No ring
* If conductor does not fit in the centering ring, use the next larger size ring or no ring
if there’s no larger ring.
3.0 Installation Steps
3.1 Aluminum conductors must be wire brushed shortly
before installing the connector. The conductor must be
clean and dry before installing the connector.
3.2 Check that screws are not protruding into the connector
bore. Unscrew the bolts, as needed, to clear the bore.
Do not remove the bolts from the connector. Feed the
stripped cable ends into the connector until conductor
contacts the connector center stop. Hand tighten all of
the bolts to the conductor.
