ProLock makes extension cords with a patented locking mechanism that prevents accidental disconnects. The system holds with 80 lbs of pull strength — enough to stop power tools from yanking loose when you drag them across a jobsite.
That’s it. That’s what they do. Not a huge product line, not a corporate empire. Just extension cords that don’t come unplugged when you need them most.
The Locking Technology That Matters
When a standard extension cord with a 15A-125V, 3 conductor male plug is inserted into the Pro Lock connector, it won’t pull apart. This prevents accidental disconnects that result in an inconvenient loss of power. Simply pull down on the connector collar to disconnect extension cords.
The mechanism works automatically. Plug connects, you hear the click, done. No twisting, no special plugs, no adapters. Works with any standard 15-amp male plug on your tools.
Two indicator lights tell you what’s happening without guessing. The green LED confirms ground continuity, while an amber LED light indicates the cord is connected to a live power source. Simple visual confirmation that prevents shock hazards and troubleshooting headaches.
Cold Weather Performance for Montana Work
The cords stay flexible down to -58°F (-50°C) thanks to special PVC formulation. That matters when you’re framing in January or running lights for early morning concrete pours. Most extension cords turn into frozen garden hoses below zero. These don’t.
The jacket handles more than cold:
| Specification | Value |
|---|---|
| Temperature Range | -58°F to +140°F |
| Current Rating | 15A |
| Voltage | 125V AC |
| Wattage | 1875W |
| Jacket Type | SJTW (Service Junior Thermoplastic, Water-resistant) |
| Resistance Properties | Oil, water, sunlight (UV), fire, and abrasion resistant |
Built for Real Construction Use
The 12/3 gauge uses 100% copper conductors with 64-65 strands. More strands mean better flexibility and longer life under repeated bending. High-impact polycarbonate housing and reinforced collar take the abuse when cords get dragged through gravel or dropped off scaffolding.
High-visibility blue color stands out on jobsites. Sounds minor until you’re looking for your cord in a tangle of orange and yellow ones behind the saw station.
Two lengths available: 50-foot and 100-foot. Both use the same 12-gauge wire and locking system. The 50-footer weighs 6.75 pounds — manageable for most applications without the bulk of longer cords you don’t need.
Applications include construction job sites and power tool ‘run-aways’, outdoor events, industrial workshops, agricultural use, and powering heavy-duty equipment like compressors and saws where security is critical.
Worth it for crews tired of chasing disconnected cords across jobsites. Skip it if you’re just running a shop vac in the garage — the locking feature solves problems that don’t exist for stationary tools.
Frequently Asked Questions
Q: How much force does it take to disconnect a ProLock extension cord?
The ProLock locking mechanism holds with 80 lbs of pull strength, preventing accidental disconnects when tools get dragged across a jobsite. To release the connection, you simply pull down on the connector collar — no special tools or excessive force required.
Q: What temperature range can ProLock extension cords handle?
ProLock extension cords stay flexible from -58°F to +140°F (-50°C to +60°C) thanks to their special PVC jacket formulation. The SJTW-rated jacket is also oil, water, UV, fire, and abrasion resistant, making them suitable for year-round outdoor use.
Q: What do the LED lights on ProLock cords indicate?
ProLock cords feature two indicator lights: a green LED that confirms ground continuity (CGM - Continuous Green Ground Check) and an amber LED that shows when the cord is connected to live power. These visual indicators help prevent shock hazards and make troubleshooting faster.
Q: What gauge wire and lengths are available for ProLock extension cords?
ProLock extension cords come in 12/3 gauge with 100% copper conductors (64-65 strands of 30 AWG per conductor) in both 50-foot and 100-foot lengths. Both lengths are rated for 15 amps, 125V AC, and 1875 watts.
Q: Will ProLock connectors work with any standard plug?
Yes, ProLock female connectors automatically lock onto any standard 15A-125V, 3-conductor male plug — no special adapters or proprietary plugs needed. The patented locking mechanism engages when you insert a standard plug and releases when you pull down on the collar.
Q: Who actually makes ProLock extension cords?
ProLock extension cords are manufactured by Century Wire & Cable, with the 50-foot blue model carrying part number D14412050BL. The brand operates under multiple names including “PRO LOCK” and “Bad Ass Extension Cords” but the core locking technology and specifications remain consistent.
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