3m Qci series User manual

3M™Shearbolt Connectors

QCI Series

Instructions

FCAUTION

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.

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.

3.3 Shear the bolts, by using the correct hex key/socket and

following the sequence appropriate for the number of

connector bolts (see illustration below). The installer

can use a ratchet with the correct hex key/socket and/or

an electric impact wrench to tighten and shear the bolts.

If using an electric impact wrench, the wrench must

be 18 volts or greater and have a torque of 160 ft.-lbs.

(217N•m)orgreater.

3M™Shearbolt Connector Hex Key/Socket Size

QCI 2-250 5 mm

QCI 1/0-350 6 mm

QCI 4/0-600 8 mm

QCI 350-750 8 mm

QCI 500-1000 8 mm

QCI 1000-1250 8 mm

31 8 6

143

4 57

Tighten bolts from outside in

8-Screw Connector

6-Screw Connector

4-Screw Connector

3.4 Discard the sheared bolt tops. They can be recycled.

3.5 Clean the surface of the connector to remove any debris

or grease.

3.6 Apply the included 3M™Foil Tape Connector Wrap

1115B. Start by checking the foil tape width, before

removing the liner. The tape must extend from connector

taper to connector taper (it may extend down the tapers

a small amount). The longer length will wrap around the

connector.

3.7 Remove the liner from the foil tape. Align the foil edge

with the recessed bolt wells in a direction that covers the

sheared bolts.

Wrap 3M™Foil Tape

Connector Wrap 1115B

around connector

Align edge with

bolt wells

3.8 Once foil tape is properly aligned, continue wrapping

the foil tape around the connector until it covers the bolt

wells with a second layer. Press down the ends of the

tape at the final edge and near the connector tapers.

End of Wrap 3M™Foil Tape

Connector Wrap 1115B

bolt wells with second layer

Press down edges

3M is a trademark of 3M Company.

Important Notice

All statements, technical information, and recommendations related to 3M's products are based on information believed to be reliable, but the accuracy or completeness is not

guaranteed. Before using this product, you must evaluate it and determine if it is suitable for your intended application.You assume all risks and liability associated with such

use. Any statements related to the product which are not contained in 3M's current publications, or any contrary statements contained on your purchase order shall have no

force or effect unless expressly agreed upon, in writing, by an authorized officer of 3M.

Warranty; Limited Remedy; Limited Liability.

This product will be free from defects in material and manufacture for a period of one (1) year from the time of purchase.3M MAKES NO OTHER WARRANTIES INCLUDING,

BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. If this product is defective within the warranty

period stated above, your exclusive remedy shall be, at 3M's option, to replace or repair the 3M product or refund the purchase price of the 3M product. Except where

prohibited by law, 3M will not be liable for any indirect, special, incidental or consequential loss or damage arising from this 3M product, regardless of the

legal theory asserted.

Electrical Markets Division

6801 River Place Blvd.

Austin, TX 78726-9000

800.245.3573

Fax 800.245.0329

www.3M.com/electrical

Please Recycle. Printed in USA.

78-8127-9877-1-D

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