Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

BRADY Circuit Breaker Lockout: Clamp-On, For 120/277V AC Volt - Clamp-On Circuit Breaker Lockouts
BRADYClamp-On Circuit Breaker Lockouts

BRADY Circuit Breaker Lockout: Clamp-On, For 120/277V AC Volt

The BRADY Clamp-On Circuit Breaker Lockout (MPN 66321) is designed for 120/277V AC multipole circuit breakers, specifically for use with three-pole breakers with a tie-bar. It does not include a cable tie slot. 3G…

SKU 3G-OTH-556467

Brand
BRADY
Item
Circuit Breaker Lockout: Clamp-On, For 120/277V AC Volt
Category
Clamp-On Circuit Breaker Lockouts
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

BRADY
Manufacturer Part Number
66321
Type
For 120/277V AC Volt, For Multipole Circuit Breaker Type
For Voltage
120/277V AC
For Use With
Three-Pole Breakers with Tie-Bar
Includes Cable Tie Slot Final
No
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

BRADY Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The BRADY Clamp-On Circuit Breaker Lockout (MPN 66321) is designed for 120/277V AC multipole circuit breakers, specifically for use with three-pole breakers with a tie-bar. It does not include a cable tie slot. 3G Electric interprets your demand, sources this genuine BRADY lockout, and provides a quote with expert support across 14 industrial departments — with specialist depth in combustion, pumps, and controls.

Frequently Asked Questions

What is the BRADY Circuit Breaker Lockout 66321 used for?

The BRADY 66321 clamp-on lockout secures three-pole circuit breakers with a tie-bar during maintenance. It prevents accidental re-energization on 120/277V AC systems, supporting lockout/tagout safety procedures in industrial facilities. 3G Electric supplies this genuine BRADY lockout and provides expert support across 14 industrial departments.

What are the specifications of the BRADY 66321 lockout?

The BRADY 66321 is a clamp-on circuit breaker lockout rated for 120/277V AC voltage. It is designed for multipole breakers, specifically three-pole breakers with a tie-bar. The manufacturer part number is 66321, and it does not include a cable tie slot. 3G Electric sources this genuine BRADY lockout for worldwide delivery.

Where to buy the BRADY 66321 lockout worldwide?

3G Electric supplies the genuine BRADY 66321 clamp-on circuit breaker lockout to customers worldwide. We handle full logistics, customs clearance, and delivery to your facility. As a global industrial solutions provider, we interpret your demand, source the correct part, and provide a competitive quote with expert support.

How to install the BRADY 66321 clamp-on lockout?

To install the BRADY 66321, clamp the lockout onto the three-pole breaker's tie-bar, ensuring it fully engages the switch handle. Apply a padlock through the lockout holes to secure the breaker in the OFF position. Always follow your facility's lockout/tagout procedures. 3G Electric can provide application guidance for this BRADY lockout.

Used in

Common applications for BRADY
Facility maintenance — Brady bench liners (MS-915WH) for protecting work surfaces in repair shops
Industrial pumping — Brady spring foot valves (SFV-75) for priming centrifugal pumps in irrigation systems
Safety compliance — Brady barricade tape (91102) for cordoning off hazardous areas during maintenance
Asset security — Brady lead and wire seals (23302) for tamper-evident locking on utility meters
Logistics tracking — Brady cable seals (95167) for securing shipping containers with sequential numbering

BRADY Products

3G Electric supplies BRADY clamp-on circuit breaker lockouts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

More from BRADY

View all BRADY parts
BRADY Oversized Breaker Lockout: Clamp-On, For 480/600V AC Volt, Includes Cable Tie Slot, 6 PK (MPN 148691). Key specifications — For Voltage: 480/600V AC; For Circuit Breaker Type: Oversized; For Use With: Circuit Breaker with Standard Nylon Cable Ties; Brand: BRADY; Includes Cable Tie Slot_Final: Yes.
BRADY
BRADY Oversized Breaker Lockout: Clamp-On, For 480/600V AC Volt, Includes Cable Tie Slot, 6 PK (MPN 148691). Key specifications — For Voltage: 480/600V AC; For Circuit Breaker Type: Oversized; For Use With: Circuit Breaker with Standard Nylon Cable Ties; Brand: BRADY; Includes Cable Tie Slot_Final: Yes.
BRADY Circuit Breaker Lockout: Clamp-On, For 120/277V AC Volt, 6 PK (MPN 176496). Key specifications — For Voltage: 120/277V AC; For Use With: Lockout Tagout; Brand: BRADY; Includes Cable Tie Slot_Final: No.
BRADY
BRADY Circuit Breaker Lockout: Clamp-On, For 120/277V AC Volt, 6 PK (MPN 176496). Key specifications — For Voltage: 120/277V AC; For Use With: Lockout Tagout; Brand: BRADY; Includes Cable Tie Slot_Final: No.
BRADY Single Pole Breaker Lockout: Clamp-On, For 480/600V AC Volt, Includes Cable Tie Slot, 25 PK (MPN 148686). Key specifications — For Voltage: 480/600V AC; For Use With: Circuit Breaker with Standard Nylon Cable Ties; Brand: BRADY; Includes Cable Tie Slot_Final: Yes.
BRADY
BRADY Single Pole Breaker Lockout: Clamp-On, For 480/600V AC Volt, Includes Cable Tie Slot, 25 PK (MPN 148686). Key specifications — For Voltage: 480/600V AC; For Use With: Circuit Breaker with Standard Nylon Cable Ties; Brand: BRADY; Includes Cable Tie Slot_Final: Yes.
BRADY Single Pole Breaker Lockout: Clamp-On, For 120/277V AC Volt, 65965, 6 PK. Key specifications — For Voltage: 120/277V AC; For Use With: Internal-Trip Multi-Pole Breakers; Brand: BRADY; Includes Cable Tie Slot_Final: No.
BRADY
BRADY Single Pole Breaker Lockout: Clamp-On, For 120/277V AC Volt, 65965, 6 PK. Key specifications — For Voltage: 120/277V AC; For Use With: Internal-Trip Multi-Pole Breakers; Brand: BRADY; Includes Cable Tie Slot_Final: No.
BRADY Multi-Pole Breaker Lockout: Clamp-On, For 120/277V AC Volt, Includes Cable Tie Slot, 50 PK (MPN 148695). Key specifications — For Voltage: 120/277V AC; For Use With: Circuit Breaker with Standard Nylon Cable Ties; Brand: BRADY; Includes Cable Tie Slot_Final: Yes.
BRADY
BRADY Multi-Pole Breaker Lockout: Clamp-On, For 120/277V AC Volt, Includes Cable Tie Slot, 50 PK (MPN 148695). Key specifications — For Voltage: 120/277V AC; For Use With: Circuit Breaker with Standard Nylon Cable Ties; Brand: BRADY; Includes Cable Tie Slot_Final: Yes.
BRADY Multi-Pole Breaker Lockout: Clamp-On, For 120/277V AC Volt, Includes Cable Tie Slot, 6 PK (MPN 148697). Key specifications — For Voltage: 120/277V AC; For Use With: Circuit Breaker with Standard Nylon Cable Ties; Brand: BRADY; Includes Cable Tie Slot_Final: Yes.
BRADY
BRADY Multi-Pole Breaker Lockout: Clamp-On, For 120/277V AC Volt, Includes Cable Tie Slot, 6 PK (MPN 148697). Key specifications — For Voltage: 120/277V AC; For Use With: Circuit Breaker with Standard Nylon Cable Ties; Brand: BRADY; Includes Cable Tie Slot_Final: Yes.
BRADY Single Pole Breaker Lockout: Clamp-On, For 480/600V AC Volt, 6 PK (MPN 65966). Key specifications — For Voltage: 480/600V AC; For Use With: Internal-Trip Multi-Pole Breakers; Brand: BRADY; Includes Cable Tie Slot_Final: No.
BRADY
BRADY Single Pole Breaker Lockout: Clamp-On, For 480/600V AC Volt, 6 PK (MPN 65966). Key specifications — For Voltage: 480/600V AC; For Use With: Internal-Trip Multi-Pole Breakers; Brand: BRADY; Includes Cable Tie Slot_Final: No.
BRADY Single Pole Breaker Lockout: Clamp-On, For 120/277V AC Volt, 6 PK (MPN 65810). Key specifications — For Voltage: 120/277V AC; For Use With: Breakers without Hole in Switch Tongue; Brand: BRADY; Includes Cable Tie Slot_Final: No.
BRADY
BRADY Single Pole Breaker Lockout: Clamp-On, For 120/277V AC Volt, 6 PK (MPN 65810). Key specifications — For Voltage: 120/277V AC; For Use With: Breakers without Hole in Switch Tongue; Brand: BRADY; Includes Cable Tie Slot_Final: No.