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Running a 100-amp feed to a garage, shop, or sub-panel is a big job, and the miserable part is usually the wire itself — too stiff, too short, or rated for the wrong burial condition. The right 100 amp service wire makes the pull manageable and the inspection painless, and the choices below are the ones owners actually trust for direct burial and conduit runs.
I’m Min — the founder and writer behind Gadgets Feed. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
This list uses flexible matching, so not every pick is the exact number searched; the nearest same-type size serves the same purpose — that is exactly how to approach picking the best 100 amp service wire.
Our Picks at a Glance
How To Choose The Best 100 Amp Service Wire
You need a service wire that safely carries your electrical load, fits your budget, and survives the way you run it—buried underground or through conduit. Nail those three choices and the wire becomes the boring, reliable part of the job.
Match The Gauge To The Amperage
A 100-amp service typically uses 2 AWG copper or 1/0 AWG aluminum, but you need to check the exact ampacity rating on the cable you buy. Aluminum wire carries less current than copper at the same gauge, so it needs to be thicker for the same job.
Direct Burial vs. Conduit vs. Duct
Cables rated for direct burial can go straight into a trench, which saves you the cost of conduit. If a cable is only rated for wet or dry locations, you must protect it in conduit. This one choice changes the whole installation plan.
Quick Comparison
| Model | Best For | Ampacity (Max) | Material | Weight Per Foot | Amazon |
|---|---|---|---|---|---|
| 100 FT Aluminum URD Dyke 2-2-2-4★ Best Overall | Long direct burial runs | 155 A | Aluminum | — | Amazon |
| 2-2-2-4 SER Aluminum Service Entrance CableBest Value | Above-ground service masts | 100 A | Aluminum | 0.359 lbs/ft | Amazon |
| Aluminum 2-2-2 Triplex URD RamapoTop Performer | High-ampacity buried feeds | 165 A | Aluminum | — | Amazon |
| 2 AWG XHHW-2 Aluminum Building Wire | Budget conduit pulls | 100 A | Aluminum | 0.081 lbs/ft | Amazon |
| 10′ 2-2-2-4 SER Copper Service Entrance | Short, high-amp copper runs | 130 A | Copper | — | Amazon |
| 150′ 2-2-2-4 SER Aluminum 600V | Long runs to detached garages | — | Aluminum | — | Amazon |
| 100′ Nassau 1/0-1/0-1/0-2 URD Cable | Heavy 100-amp underground lines | — | Aluminum | — | Amazon |
| 400′ 2-2-2-4 Aluminum Mobile Home Feeder | Very long workshop feeds | 100 A | Aluminum | 0.343 lbs/ft | Amazon |
In‑Depth Reviews
1. 100 FT Aluminum URD Dyke 2-2-2-4 Cable Direct Burial
Our pick — over 4.5★ from 450+ verified ratings; the strongest balance of quality and price.
The buried workhorse that keeps delivering a year after install.
This is the cable for the classic 100-amp sub-panel project, and it earns its top spot on both rated capacity and owner confidence. It carries 155 amps in direct burial, which is a full 65% more headroom than the 100 A you need, so a 100-amp panel is never running the wire hot. The outer diameter is 0.973 inches, and the 7-strand aluminum construction gives it a stiffness buyers expect from a real service cable.
Owners consistently report feeding sub-panels with it and having it survive the seasons — one buyer’s run has been in the ground for 6 months with no issues. The biggest selling point the review pages keep landing on is quality, with well over three dozen buyers singling it out, and value for money is the second-most-praised trait. It is a 600-volt, 4-wire assembly with a size 2 conductor and a size 4 neutral, so it is structured exactly like a standard service entrance feed.
What wins people over is how cleanly it handles when you take your time: it pulls easily with wax and preps easy for install. The honest trade-off is the weight — at 367 lbs per 1000 feet, this is heavy and stiff wire, so a long pull through conduit will test your patience. That is the price of a cable built for the ground.
Why It Leads The List
- 155-amp direct burial rating clears a 100-amp load with serious headroom
- Owner reviews praise the build quality more than anything else
- True 4-wire setup suits a detached sub-panel with a separate neutral
What To Expect In The Trench
- Heavy and stiff at 367 lbs per 1000 ft
- A few buyers report the shipped length can be short of spec
The top pick: Reach for this when you want one proven cable for a buried 100-amp sub-panel feed and you want ampacity to spare.
Think twice if: Your run is short and indoor-only — a lighter SER cable will be far easier to wrestle into place.
2. 2-2-2-4 SER Aluminum Service Entrance Cable (50FT Cut)
The above-ground entrance cable that makes a 50-foot mast job simple.
If your run is above ground — think a service mast or an exterior wall between a meter and a panel — this is the exact cable shape you want. It is rated for 600 volts and 100 amps, works in wet and dry locations, and carries 4 wires total: 3 conductors and 1 bare neutral. The gray jacket and the 0.96-inch diameter tell you this is a real service entrance cable, not a flimsy indoor wire.
The review pages are quietly enthusiastic, with quality and functionality the two most-mentioned positives. One owner noted it works well even for a 70-amp sub-panel, which shows there is headroom for smaller feeds.
Owners sum it up as great quality and a great price, and the consensus is that it simply does the job. The catch is that it is specifically an above-ground cable — do not bury it without conduit, because it lacks the direct burial rating of the URD cables in this list.
The value read: You get a complete, code-friendly service entrance assembly for short above-ground runs, and the owners back it up.
The one caveat: Keep it out of the dirt unless it is inside conduit, and plan for a few days of shipping time.
3. Aluminum 2-2-2 Triplex URD Ramapo 100 AMP Direct Burial (100FT)
The buried feed with the highest headroom of the direct-burial bunch.
This Ramapo triplex cable is the one to grab when you want the most ampacity for a buried 100-amp feed. It is rated for 165 amps in direct burial, which beats the Dyke cable’s 155 A in the same ground conditions. The wire diameter is 0.87 inches, so it pulls a little easier than the thicker SER cables, and it is a 7-strand aluminum build rated for 600 volts.
Buyers use it for exactly the jobs you would expect — getting power to a shed and wiring up a garage sub-panel — and the word “value” shows up repeatedly. The review pages point to it as right-size and ready for a sub-panel, and a common tip from owners is to pair it with oxidation inhibitor (oxguard) on the terminations, which is smart practice for aluminum conductors. At 100 feet, it covers the typical shed or garage distance without splicing.
The standout is the combination of price and capacity: you pay for a 100-amp service but get 165 amps of rated headroom. The one thing to remember is that this is a triplex layout, so confirm your panel’s neutral and ground requirements before you buy.
Why it stands out: No other buried cable here gives you 165 amps of direct burial capacity for a 100-amp project.
Fit note: This is a three-conductor assembly — check if your setup needs a separate fourth ground wire.
4. 10′ 2-2-2-4 SER Copper Service Entrance Wire Cable
Copper clarity and 130 amps of capacity in a short, terminal-friendly run.
Here is the copper answer for the short hop — like from a main panel to an inverter or a 125-amp sub-panel — where you want maximum conductivity and a 5.0-star owner record. The nominal outer diameter is 992 mils, so it is a substantial cable.
Owners mention this cable is exactly as described, with good quality and value despite copper’s high cost. One owner runs it from a service panel to a whole-home inverter and reports it has kept batteries charged reliably, calling it a beast to get into place—that stiffness signals a serious copper service cable. It is a 4-wire assembly with a 7-strand build rated for 600 volts (the standard voltage for residential service).
The premium here is real: copper costs more, and 10 feet is the longest this listing offers, so it is a terminal connection cable rather than a whole-run solution. But when you need the best conductor for a critical short run, this is the one.
The premium call: Choose this for short, high-value connections where copper’s reliability and the 130 A rating make the extra cost easy to justify.
Keep in mind: This is a 10-foot cut only — for a long buried run you will need one of the aluminum URD cables above.
5. 2 AWG XHHW-2 Aluminum Building Wire (155 Foot Cut)
The featherweight conductor that stretches a budget of 155 feet.
This is the value play for a conduit run: a bare 2 AWG XHHW-2 aluminum conductor rated at 100 amps at 90°C, sold in a 155-foot cut that covers most garage-to-house distances. The magic is the weight — just 0.081 pounds per foot, which is 4.4 times lighter than a full SER service cable. That makes it dramatically easier to pull four strands through conduit without exhausting yourself.
The build is legitimately certified to UL 44 and ASTM B800 and B801 standards, and it uses a compact stranded aluminum conductor with a 7-strand construction. Owners have used it for over 6 months straight with all electrons delivered and no issues, and one buried it directly in the ground without problems for months. The common note is that pulling 4 strands through 1 1/4-inch PVC conduit is rough — but that is a physical reality of any 4-conductor pull, not a flaw in the wire.
This is the smart budget move because you buy exactly the conductor and buy your own jacket or raceway, skipping the premium of a pre-assembled service cable. The trade-off is that you are buying the bare wire only — you must supply the neutral, ground, and protection yourself.
The Budget Edge
- Featherweight 0.081 lbs/ft makes conduit pulls far less brutal
- UL 44 and ASTM certified build with a 100 A rating
- 155-foot cut covers long runs in one piece
The Reality Check
- You buy the bare conductor only — no neutral or ground bundled in
- Pulling four strands through tight conduit is still a workout
The budget call: Grab this when you want the lowest-cost path to a 100-amp conduit feed and you are comfortable assembling the full conductor set yourself.
skip it if: You need a ready-to-bury cable — this one has no direct burial jacket and no bundled neutral.
6. 150′ 2-2-2-4 SER Aluminum Service Entrance Cable 600V
One 150-foot spool that ends the search for a long garage feed.
When your detached garage is a long way from the house, buying one continuous 150-foot run beats splicing shorter pieces every time. This is a 2-2-2-4 SER aluminum assembly with a 4 AWG ground, rated for 600 volts, and built with multi-strand conductors that flex reasonably well for a service cable. It is the same cable shape as the Best Value pick above, just at triple the length for the long-haul job.
The owner feedback is dominated by one theme: price relief. More than one buyer priced the same cable at a big-box store and found this listing far cheaper — one owner compared it to a near- quote for their project. Reviewers have used it for sub-panels in detached garages and report it works great, and generator connection jobs have gone smoothly off this spool. It arrives neatly packaged and in excellent condition.
This is the pick when the distance is the problem and you want a single, complete, above-ground service entrance cable ready to pull. The catch is the same as any SER cable — it is meant for above-ground or conduit use, not direct burial, so plan your protection accordingly.
The distance fix: One 150-foot continuous run means no mid-trench splices and no wasted leftover coil.
The honest limit: Not a direct burial cable — run it in conduit or on a protected exterior path.
7. 100′ Nassau 1/0-1/0-1/0-2 Notre Dame Quadruplex URD Cable
The oversized underground cable that makes a 100-amp feed feel easy.
Here is the over-built option: a 1/0-1/0-1/0-2 quadruplex aluminum cable designed for underground direct burial. At 1/0 gauge with 19 strands, this is a significantly beefier conductor than the 2 AWG cables above, which is exactly what you want for a long or heavily loaded feed. The insulation runs 80 mils thick, the outer diameter is 1.236 inches, and the weight is a substantial 574 lbs per 1000 feet.
Owners have used it for an underground line to a pump house and praise its flexibility around 90-degree conduit turns, noting the tough coating stands up to direct burial—with a smart tip to bed it in 6-12 inches of sand to protect against rock abrasion. The bigger conductors also mean less voltage drop on longer runs, which is the real reason to step up from 2 AWG to 1/0. It arrives on a large spool that may need a forklift to unload.
The trade-off is real and worth knowing: a few customers note the delivered length can fall short of the advertised 100 feet, which forced one job to add an extra junction box. For most runs this is a superb heavy-duty choice, but measure your trench before you cut.
The heavy-duty call: Choose this when you want maximum conductor size and minimal voltage drop on a buried feed, and you can handle the weight and spool size.
Measure first: The occasional short-length report means you should account for slack in your trench plan.
8. 400′ 2-2-2-4 Aluminum Mobile Home Feeder Cable 600V
A 400-foot spool built for the workshop that sits far from the panel.
This is the cable for the serious long-distance project — a 14×32 workshop, a far corner of a property, anywhere the feeder has to travel a quarter of the way to a football field. The 2-2-2-4 aluminum construction is rated for a 100-amp allowable ampacity at 600 volts, the cable OD is 0.944 inches, and it tips the scale at 0.343 pounds per foot. At 400 feet, you can run the whole line in one continuous pull.
The build is a single-strand conductor type from Nassau Electrical Supply, and the owner record is clean, with quality the most-praised trait. One buyer installed it in a 14×32 workshop for a 100-amp service and reported the whole run went very smoothly. Another ran it to a garage as a DIY project and found the price right for the scale of the job. It is sold as a single 400-foot unit in a silver jacket, built for direct burial use.
The only realistic reason to buy this is that you have a genuinely long run and want it done in one piece. The catch is the logistics — 400 feet of heavy aluminum cable is a large, heavy spool to receive and move, so plan your delivery drop zone.
The mega-run fix: A full 400 feet of 100-amp-rated cable means no splices and no second order for the far-flung shop.
The logistics note: This is a big, heavy spool — arrange for a drop point where you can actually maneuver it.
Understanding the Specs
Ampacity and Gauge
Ampacity is the maximum current a wire can carry safely, and it is the single number that decides if a cable fits your 100-amp service. A 2 AWG aluminum conductor typically rates around 100 amps, while 1/0 AWG aluminum carries more current for long or demanding runs. Always pick a cable whose ampacity at your burial or conduit condition exceeds your panel rating.
Direct Burial vs. SER Cable
Direct burial cable (URD) can go straight into a trench because its jacket is built for soil contact. Service entrance cable (SER) is rated for wet and dry locations but is not meant to be buried bare — it needs conduit or a protected path. Knowing which one you are buying tells you whether you also need to buy conduit.
FAQ
What gauge wire do I need for a 100 amp service?
What is the difference between URD and SER cable?
What does the gauge sequence like 2-2-2-4 mean?
Can I bury SER cable directly in the ground?
Why is aluminum wire used for 100 amp service instead of copper?
How much does 100 amp service wire weigh per foot?
What is the ampacity of 2 AWG aluminum wire?
How long can a 100 amp service wire run be?
Final Thoughts: The Verdict
For most buyers, the 100 amp service wire winner is the 100 FT Aluminum URD Dyke 2-2-2-4 because it pairs a 155-amp direct burial rating with the strongest owner backing for the classic sub-panel job. If you want the lightest pull for a conduit run on a tighter budget, grab the 2 AWG XHHW-2 Aluminum Building Wire. And for a buried feed with the most headroom, the Aluminum 2-2-2 Triplex URD Ramapo is the one to reach for.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of August 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
As an Amazon Associate, Gadgets Feed earns from qualifying purchases. This does not affect which products we feature.