When using shielded cable for control signals, if the cable is connecting equipment that is close together and the grounds are bonded together, then both ends of the shield can be grounded. If the cable is connected to equipment that may have a different ground potential, then ground the shield at one end only to prevent large currents from flowing in the shield. The shield on the ungrounded
end may be tied to ground with a capacitor (for example: 10 nF, 100V or higher) in order to provide a path for the higher frequency noise.
Handle Accessories
Field-installed handle accessories are also available.
Table 6: Field-Installable Handle Accessories
Accessory Description Catalog
Number
Handle Tie
Converts any two adjacent 120/240 Vac 1P QO circuit breakers to independent trip 2P. QO1HT
Converts any two adjacent 120/240 Vac 1P side-by-side QOT circuit breakers to
independent trip 2P. QOTHT
Handle Clamp Clamp for holding QO 1P handle in ON or OFF position. QO1LO
Clamp for holding QO or Q1 (1P, 2P, or 3P) circuit breaker handle in ON or OFF position. HLO1
Handle Padlock
Attachment for
Padlocking in ON
or OFF Position
Loose attachment for padlocking 1P QO circuit breaker in ON or OFF position. QOHPL
Fixed attachment for padlocking 1P QO circuit breaker in ON or OFF position. QO1PA
Attachment for padlocking 1P side-by-side QOT circuit breaker in ON or OFF position. QOTHPA
Fixed attachment for padlocking 2P QO-GFI circuit breaker in ON or OFF position. GF12PA
Loose attachment for padlocking 2P and 3P standard QO circuit breaker in ON or OFF
position. QO1HPL
Fixed attachment for padlocking 2P and 3P standard QO circuit breaker in ON or OFF
position. QO1PL
Handle Padlock
Attachment for
Padlocking in OFF
Position
Fixed attachment for padlocking 1P QO circuit breaker in OFF position only. QO1PAF
Fixed attachment for padlocking 2P and 3P QO circuit breakers in OFF position only. QO2PAF
Fixed attachment for padlocking 1P QO-GFI, QO-AFCI and QO-EPD circuit breakers in OFF
position only. QOGFI1PAF
Fixed attachment for padlocking 2P QO-GFI and QO-EPD circuit breakers in OFF position
only. QOGFI12PAF
Sub-Feed Lugs
60 A 2P plug-on—2 spaces required (6–2 Al/Cu) QO60SL
125 A 2P plug-on—2 spaces required (12–2/0 Al/Cu) QO2125SL
225 A 2P plug-on—4 spaces required (4–300 Al/Cu) QO2225SL
125 A 3P plug-on—3 spaces required (12–2/0 Al/Cu) QO3125SL
Mechanical
Interlock
Attachment
For interlocking the handles of two 2P or one 2P and one 1P QO and Q1 circuit breaker
mounted side-by-side so that only one circuit breaker can be ON at a time (Not for QOU) QO2DTI
Mechanical
Interlock with
Retaining Kit
For securing two adjacent back-fed circuit breakers in dual power supply applications. Can
be used with two 2P or one 2P and one 1P QO circuit breaker in QO816L100 load center
