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Miller MightyLite RL20G Self-Retracting Lifeline, 20 ft Galvanized (Class B)
$314.99
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EDITORIAL REVIEW: 4.5/5 WC Safety Review — the Miller MightyLite RL20G self-retracting lifeline, 20 ft Editorial assessment by the WC Safety Editorial Team, based on published Honeywell Miller specifications and c...
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EDITORIAL REVIEW: 4.5/5 WC Safety Review — the Miller MightyLite RL20G self-retracting lifeline, 20 ft
Editorial assessment by the WC Safety Editorial Team, based on published Honeywell Miller specifications and category fit. We did not laboratory-test this product.
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Miller MightyLite RL20G Self-Retracting Lifeline, 20 ft Galvanized (Class B) Overview
The Miller MightyLite RL20G self-retracting lifeline is the connecting device that links a full body harness to an overhead anchor in a personal fall-arrest system. Under OSHA 1926.502 and 1910.140, fall arrest must use a full body harness — never a body belt — connected to a compliant anchorage; this Miller MightyLite RL20G-Z7 fills the connecting-device role on 3/16-inch galvanized steel cable across a 20 ft working length.
As a 20 ft galvanized cable SRL, its draw is durable overhead reach with a well-equipped feature set: galvanized cable (about 3,000 lb tensile) and a galvanized housing resist abrasion and weather, a double swivel SRL design reduces cable twist, and a narrow payout port, quick-activating inertia brakes, and an integral load indicator round out the unit. It ships with a carabiner and a tagline, its connectors carry 3,600 lb rated gates, and Honeywell rates this 310 lb cable SRL for up to a 310 lb user with a 900 lb maximum peak arresting force.
Like any device in the fall protection category, this is a buyer-intent item to pair with the rest of a system. Match it with a compatible full body harness and a rated overhead anchor point. It meets ANSI Z359.14-2014 as a Class B SRL along with A10.32-2012 and CSA Z259.2.2-17, and it is intended for overhead anchorage — not sharp or leading edges, for which Honeywell offers the separate MightyLite Leading-Edge (RL20G-Z7LE). Any SRL that has arrested a fall must be removed from service. Buyers cross-reference this self-retracting lifeline against shorter, longer, and edge-rated options before ordering.
What This MightyLite SRL Is Built For
| Use case | Fit | Buyer guidance |
|---|---|---|
| Overhead-anchored construction work | Purpose-built | 20 ft of cable gives a working radius from a single overhead Class B anchor. |
| Abrasive / outdoor environments | Strong | Galvanized cable and galvanized housing resist wear and weather better than web. |
| Overhead-mount with tagline retrieval | Included | The tagline lets a worker reach the snap hook after retraction without climbing. |
| Leading-edge / foot-level work | Not this model | Use the MightyLite Leading-Edge (RL20G-Z7LE) for sharp-edge or foot-level anchorage. |
| Reuse after a fall event | Not suitable | OSHA requires any fall-arrest component subjected to impact loading be retired; the load indicator flags it. |
Fall protection is life-safety equipment. A personal fall arrest system must limit free fall and arrest forces under OSHA 1926.502 / 1910.140 and ANSI Z359: use a full-body harness (never a body belt for fall arrest) with a compatible self-retracting lifeline or shock-absorbing lanyard and an anchorage rated 5,000 lb per worker (or engineered to a 2:1 safety factor). Match the SRL's class to the anchorage location and edge exposure — this is a Class B overhead device, so anchor overhead and keep the cable off sharp edges; inspect every component before each use, immediately retire anything that has arrested a fall or shows damage, and work to a documented rescue plan. Browse fall protection and self-retracting lifelines.
Pros & Cons
Pros
- 20 ft of 3/16-inch galvanized steel cable for durable overhead reach
- Galvanized housing with a double-swivel design to reduce cable twist
- Quick-activating inertia brakes and an integral load indicator
- Carabiner and tagline included; connectors carry 3,600 lb rated gates
- Meets ANSI Z359.14-2014 Class B, A10.32-2012, and CSA Z259.2.2-17
Cons
- Overhead Class B only — not edge-rated; use the RL20G-Z7LE for leading-edge work
- SRL only; the full body harness and anchorage are sold separately
- Rated to a 310 lb user — confirm combined worker-plus-tools weight
- Cable and 20 ft length make it heavier than a compact web PFL
How It Compares
This 20 ft Class B cable unit is one build in the Miller MightyLite line. Weigh it against the alternatives before ordering:
| Model | Length | Edge rating | Best for |
|---|---|---|---|
| RL20G-Z7 (this page) | 20 ft cable | Overhead (Class B) | Overhead-anchored construction work |
| MightyLite other lengths | 30 / 50 ft cable | Overhead | Wider overhead work zones |
| MightyLite Leading-Edge (RL20G-Z7LE) | 20 ft cable | Leading edge | Sharp-edge or foot-level anchorage |
Choose the RL20G-Z7 for overhead work, a longer MightyLite for a wider zone, or the RL20G-Z7LE for leading-edge work. Whichever you pick, complete the system with a full body harness from the fall protection range.
Specifications
| Brand | Honeywell Miller |
| Model / Part Number | RL20G-Z7/20FT (MightyLite) |
| Type | Self-Retracting Lifeline (fall arrest connecting device) |
| Length / Lifeline | 20 ft; 3/16-inch galvanized steel cable (~3,000 lb tensile) |
| Housing / Features | Galvanized housing, double swivel, narrow payout port, inertia brakes, integral load indicator; carabiner + tagline |
| Connectors | 3,600 lb rated gates |
| Capacity / Standards | Up to 310 lb; 900 lb max peak arrest; OSHA 1926.502/1910.140, ANSI A10.32-2012 & Z359.14-2014 (Class B), CSA Z259.2.2-17 |
Related Guides
best self-retracting lifelines, fall protection equipment guide, best safety harness, best fall protection kits, best fall protection lanyards.
Related Resources
fall protection self retracting lifelines full body harnesses anchor points
Frequently Asked Questions
What length and cable does the Miller MightyLite RL20G use?
It is a 20 ft self-retracting lifeline on 3/16-inch galvanized steel wire rope, listed at about 3,000 lb tensile strength. Galvanized cable resists abrasion and outdoor exposure, which suits a 20 ft overhead working length. Other MightyLite lengths are separate part numbers.
What ANSI class is the RL20G-Z7?
It meets ANSI Z359.14-2014 as a Class B SRL, along with ANSI A10.32-2012 and CSA Z259.2.2-17. Class B under the 2014 standard allows a longer maximum arrest distance than Class A. It is intended for overhead anchorage and is not the edge-rated leading-edge model.
What connectors and features come on the RL20G?
It ships with a carabiner and a tagline, and its connectors carry 3,600 lb rated gates. The unit uses a double-swivel design to reduce cable twist, a narrow payout port, quick-activating inertia brakes, and an integral load indicator that flags a unit that has arrested a fall.
What worker weight capacity does the RL20G support?
Honeywell rates the MightyLite RL20G for up to a 310 lb (140.6 kg) user, including tools and equipment, with a 900 lb maximum peak arresting force. Confirm your combined weight falls within the rated capacity before use.
What is the housing made of?
The RL20G uses a galvanized housing for durability, built around the internal drum, inertia brake, and load indicator. Galvanized construction and the galvanized cable make it a good match for abrasive or outdoor overhead work where a web SRL would wear faster.
Can I use the RL20G over a leading edge or at foot level?
No. This standard RL20G-Z7 is intended for overhead anchorage, not sharp-edge or foot-level work. For leading-edge use, Honeywell offers the MightyLite Leading-Edge (RL20G-Z7LE) as a separate part number. Do not run the cable over a sharp edge with this non-edge-rated unit. Browse our self-retracting lifelines for edge-rated options.
Does this SRL include a harness?
No. It is the self-retracting lifeline only. OSHA requires a complete personal fall-arrest system, so you also need a compliant full body harness and a rated overhead anchorage. The SRL links the harness dorsal D-ring back to the overhead anchor point.
Is a body belt allowed with this SRL?
No. OSHA 1926.502 and 1910.140 require a full body harness for fall arrest; body belts are prohibited for arresting a fall. Connect the SRL to the dorsal D-ring of a full body harness. See our fall protection range to complete the system.
What kind of anchorage do I need?
Per OSHA, the anchorage for a personal fall-arrest system must support the loads required by the standard, commonly cited as 5,000 lb per attached worker unless engineered by a qualified person to a 2:1 safety factor. Anchor overhead per Honeywell's instructions and never tie off to an unrated point.
What is the tagline for?
The included tagline is a cord that lets a worker at ground or platform level retrieve the snap hook after the lifeline retracts to the unit, so an overhead-mounted SRL can be reached and connected without climbing. Follow Honeywell's instructions for taglined installation.
Can this SRL be reused after it arrests a fall?
No. OSHA and ANSI Z359 require that any fall-arrest component subjected to impact loading be removed from service immediately. The integral load indicator flags a deployed unit. Retire and replace the SRL after any fall event, and follow Honeywell's inspection intervals for normal use.
Is galvanized cable better than web for this SRL?
For a 20 ft overhead length in abrasive or outdoor conditions, galvanized cable resists cuts and wear better than web. Web SRLs are lighter and common at shorter lengths. Match the lifeline to your environment; compare options in our self-retracting lifelines collection.
How should I inspect the RL20G before use?
Before each use, check the galvanized cable for kinks, broken wires, or corrosion; verify the cable pays out and retracts smoothly and that the brake locks when pulled sharply; inspect the carabiner, snap hook, double swivel, and load indicator; and check the housing for cracks. Remove it from service if any component fails inspection and follow Honeywell's guidance.
Written by Steven Eaton, WC Safety Editorial. Specifications sourced from Honeywell Miller published data. Compare the range in self-retracting lifelines.
WC Safety is an independent PPE retailer and Amazon Associate; no paid placement. Match the product to your specific hazard and follow your site PPE program.
Brand / Vendor
Honeywell
Model / SKU
RL20G-Z7/20FT
Product Type
Self-Retracting Lifelines
Price
$314.99 (Amazon)
Availability
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