Circuit Breaker Lockout - C3100, Electrical Lockouts by

Circuit Breaker Lockout

Fits wide or tall circuit breaker toggles
Circuit Breaker Lockout
Item #:
  • OSHA
Other configurations of this product
Pricing C3100-491B
Price Each:
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Total Price: $11.25
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Master Lock Part# 491B. This circuit breaker lockout is designed to fit wide or tall circuit breaker toggles that are typically found on high voltage/high amperage breakers. It is constructed of powder coated steel and reinforced polymer for use in harsh environments. The innovative Grip Tight™ design locks out circuit breakers by preventing users from moving the breaker. Simply place the opening around the breaker toggle, use the thumb turn to tighten the grip around the toggle, and then close the clamping handle for a tight grip on the breaker. The 9/32" padlock opening accepts all American Lock and Master Lock padlock shackles and lockout hasp diameters.
3½ × 1¼″
Material Sku Quantity/Price
1–5 6–11 12+
Powder-Coated Steel and Reinforced Polymer C3100-491B $11.25 $10.80 $10.35
Special Freight Arrangement: Due to the size of this product, freight shipping will be required. You may contact our customer service team for a quote or you can place your order and a customer service representative will contact you about freight shipping charges. If you would like to use your own freight carrier, please include your freight carrier account in the special instructions box at the bottom of the checkout page before placing your order. A customer service representative will be in contact with you if there are any questions.

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Master Lock Circuit Breaker Lockout

Product Image Master Lock Circuit Breaker Lockout 491B C3100
SafetySign Part#: C3100
Master Lock Part#: 491B
Breaker Compatibility: Fits wide or tall circuit breaker toggles typically found on hi-voltage/hi-amperage breakers
Max. Number of Padlocks or Hasps: 1 padlock or hasp
Max. Padlock Shackle Diameter: 9/32″ (7mm)
Material: Constructed of powder coated steel and reinforced polymer for use in harsh environments
Benefits: Great strength with universal fit
Adjust to breaker with simple thumb turn and then close clamping handle for a tight grip on the toggle
Compact lockout device is easy to carry and easy to store
Accepts all American Lock and Master Lock safety padlock shackles and lockout hasp diameters
Lockout Function: Innovative patented Grip Tight™ design effectively locks out circuit breakers
OSHA 1910.147(b) Compliance: Capable of being locked out. An energy isolating device is capable of being locked out if it has a hasp or other means of attachment to which, or through which, a lock can be affixed, or it has a locking mechanism built into it. Other energy isolating devices are capable of being locked out, if lockout can be achieved without the need to dismantle, rebuild, or replace the energy isolating device or permanently alter its energy control capability.
Application: Circuit Breaker Lockout 491B Circuit Breaker Lockout 491B Application Circuit Breaker Lockout 491B Use
PDF Instructions: Download Instructions

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