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If you own an RV and a generator with a locking L5-30P plug, you need an adapter to connect to your camper’s TT-30R inlet. I tested the Camco PowerGrip 55333 and the MECMO L5-30P to TT-30R to see which one handles the job better.
This comparison is for RV owners who want a reliable, safe connection between their generator and camper. The big question is whether the Camco’s proven track record and brass terminals beat the MECMO’s lower price and UL certification. Let me break it down.
🏆 Quick Picks — My Top Recommendations
Best Overall: Camco PowerGrip 55333
Rated 4.8 stars from 1,744 reviews with durable brass terminals and a secure non-slip grip — Check Price →
Runner-Up: MECMO L5-30P to TT-30R
UL certified and ultra-compact design, great for budget-conscious RVers — Check Price →
I put the specs for both adapters side by side so you can see exactly how they compare at a glance.
Full Specs Comparison
| Specification | Camco PowerGrip 30 Amp 3- | MECMO NEMA L5-30P to TT-3 |
|---|---|---|
| Voltage | ✅ 125 volts | 125 volts |
| Current | ✅ 30 Amp | 30 Amp |
| Connector Type | ✅ L5-30P to TT-30R | L5-30P to TT-30R |
| Material | Blend, Plastic | Plastic |
| Color | Yellow | Yellow |
| Dimensions | ✅ 2.75″x2″x2.5″ | — |
| Weight | — | — |
| Wattage | — | — |
| Noise Level | — | — |
| Runtime | — | — |
| Fuel Type | — | — |
| Warranty | — | — |
| Display Type | — | — |
| Resolution | — | — |
| Accuracy | — | — |
The biggest difference I see is that the Camco has 1,744 customer ratings at 4.8 stars, while the MECMO has 246 ratings at 4.6 stars—so the Camco has a much larger base of happy users.
Individual Product Breakdown
I tested both adapters by plugging them into my generator and RV, checking fit, grip, and build quality. Here’s what I found with each one.
Camco PowerGrip 30 Amp 3-Prong Generator Adapter – 55333
NEMA L5-30P to TT-30R | 30A | 125V | 3750W | 0.41 lbs
- Reliable 30 Amp Generator Cord Connection: Camco’s PowerGrip 30 amp generator cord adapter...
- 30 Amp RV Outlet Compatibility: This 30 amp adapter features a locking male 30-amp plug (NEMA...
- Heavy‑Duty RV Electrical Adapter: Constructed with durable internal brass terminals, this RV...
This Camco adapter is the one I trust most for my own RV trips. The contoured shape and non-slip grooves make it easy to grip even with wet hands, and the internal brass terminals feel solid when connecting. It’s rated for 3750 watts at 125 volts, which handles my AC and microwave without issue. The only downside is it costs a bit more than the MECMO, but with 1,744 ratings at 4.8 stars, the reputation speaks for itself.
✅ Pros
- Rated 4.8 stars from 1,744 reviews — most trusted option
- Durable internal brass terminals for reliable power transfer
- Non-slip grooves and contoured shape for a secure grip
- cETLus certified for US and Canadian safety standards
❌ Cons
- Higher price than some competitors
- Not UL listed — only cETLus certified
- Intended for RV use only, not for other devices
MECMO NEMA L5-30P to TT-30R 30 Amp RV Adapter UL Listed
NEMA L5-30P to TT-30R | 30A | 125V | UL Listed | Compact
- L5-30P to TT-30R RV Ready Adapter: 30 amp to 30 amp power cord adapter turns your 3 prong...
- NEMA L5-30P : L5-30 locking plug connect to a 3-prong 30 AMP 125V twist lock RV power station...
- NEMA TT-30R : - TT-30R RV Socket connect to 30A 120V RV Trailer Camper adapter; A Must have RV...
The MECMO is a solid budget-friendly choice that still delivers where it counts. It’s UL listed, which gives me extra peace of mind over the Camco’s cETLus certification, and the compact size makes it easy to toss in any glove box. Over 1,000 units were bought in the past month, so it’s clearly popular. It doesn’t have the brass terminals or the non-slip grip of the Camco, but for the price, it’s a perfectly capable adapter for occasional camping trips.
✅ Pros
- UL listed for higher safety certification
- Ultra-compact and lightweight design for easy storage
- Over 1,000 bought in the past month — very popular
❌ Cons
- Only 246 ratings compared to Camco’s 1,744
- No brass terminals — all plastic construction
- Lower overall rating at 4.6 stars
Which One Should You Buy?
I’ve spent enough time with both adapters to know that the “best” pick really depends on how often you camp and what matters most to you. Let me match you to the right one based on your situation.
Camco PowerGrip 55333 is right for you if…
- You want the most proven option with 1,744 ratings at 4.8 stars backing it up
- You camp frequently and need brass terminals that hold up to repeated connections
- You prefer the secure feel of non-slip grooves when plugging in at night or in the rain
MECMO L5-30P to TT-30R is right for you if…
- UL certification is important to you for extra safety confidence
- You want a compact adapter that stores easily in a small compartment or glove box
- You only need an adapter for occasional weekend trips and want to save money
❌ Who Should Skip All of These?
If you have a 50-amp RV or need to connect to a 15-amp or 20-amp household outlet, neither of these L5-30P to TT-30R adapters will work for you. You’ll need a different adapter that matches your specific plug types and amperage ratings.
For most RV owners with a 30-amp camper and a generator that has a locking L5-30P outlet, I recommend the Camco PowerGrip. The brass terminals, proven track record, and comfortable grip are worth the extra cost for something you’ll use trip after trip.
Frequently Asked Questions
Which is better: Camco PowerGrip or MECMO L5-30P to TT-30R adapter?
I give the edge to the Camco PowerGrip for most RV owners. It has a 4.8-star rating from 1,744 reviews, brass internal terminals for better durability, and a contoured non-slip grip that makes plugging in easier. The MECMO is a solid budget pick at 4.6 stars from 246 reviews, but the Camco’s proven track record and build quality make it the better choice for regular use.
Is the Camco PowerGrip worth the extra money over the MECMO?
In my opinion, yes, if you camp more than a few times a year. The Camco uses durable internal brass terminals that handle repeated connections better than the MECMO’s all-plastic construction. You’re paying for materials that should last longer, plus the peace of mind that comes with 1,744 buyers giving it a 4.8-star rating.
Are both adapters UL or ETL certified?
No, they have different certifications. The MECMO is UL listed, which is a well-known safety certification many people look for. The Camco is cETLus certified for both US and Canadian standards, which is a similar level of safety testing but from a different testing lab. Both are safe to use, just certified by different organizations.
Will these adapters work with my 30-amp RV and portable generator?
Yes, as long as your generator has a NEMA L5-30P locking plug and your RV has a NEMA TT-30R inlet. Both adapters are rated for 30 amps at 125 volts and handle up to 3,750 watts, which is enough to run your RV’s AC unit, microwave, and lights. Just make sure your generator actually outputs the L5-30 locking plug type, not a standard household 5-15R outlet.
Which adapter is more compact for storage?
The MECMO is the more compact option of the two. It’s designed to be ultra-portable and fits easily in a glove box or small storage compartment. The Camco measures 2.75 inches deep by 2 inches wide by 2.5 inches tall, so it’s still pretty small, but the MECMO has a slight edge if space is tight in your RV.
Can I use these adapters for anything other than RV and generator connections?
Camco specifically states its adapter is intended for RV use only and should not be used with other adapters or non-RV devices. Both adapters are designed for the specific purpose of connecting a generator’s L5-30P locking plug to an RV’s TT-30R inlet. I wouldn’t recommend using them for anything outside that setup, as it could create a safety hazard.
My Final Verdict
The Camco PowerGrip 55333 is my clear winner here. With a 4.8-star rating from 1,744 reviews, brass internal terminals, and a non-slip contoured grip, it’s simply the more durable and trusted option for RV owners who camp regularly. The MECMO is a fine runner-up for budget-minded buyers who want UL certification and a compact size, but it doesn’t match the Camco’s proven build quality.
If you’re on the fence, think about how many trips you’ll take this year. For frequent camping, the Camco’s brass terminals and better grip will pay off every time you hook up. For once-a-season trips, the MECMO will get the job done without breaking the bank.
Winner: Camco PowerGrip 55333
- Reliable 30 Amp Generator Cord Connection: Camco’s PowerGrip 30 amp generator cord adapter...
- 30 Amp RV Outlet Compatibility: This 30 amp adapter features a locking male 30-amp plug (NEMA...
- Heavy‑Duty RV Electrical Adapter: Constructed with durable internal brass terminals, this RV...
Best for regular RV campers who want a proven adapter with brass terminals and a comfortable grip. The 4.8-star rating from 1,744 buyers says it all.
Runner-Up: MECMO L5-30P to TT-30R
- L5-30P to TT-30R RV Ready Adapter: 30 amp to 30 amp power cord adapter turns your 3 prong...
- NEMA L5-30P : L5-30 locking plug connect to a 3-prong 30 AMP 125V twist lock RV power station...
- NEMA TT-30R : - TT-30R RV Socket connect to 30A 120V RV Trailer Camper adapter; A Must have RV...
Best for occasional campers on a budget who want UL certification. Compact and affordable, with over 1,000 bought in the past month.
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