---
title: "8/3 Romex — $470K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/tools-home-improvement/8-3-romex"
last_updated: "2026-08-08T11:41:58.553Z"
locale: en
meta:
description: "Niche score 41/100 · $470K/yr market · 103K searches/yr · $139.67 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 41/100 · $470K/yr market · 103K searches/yr · $139.67 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "8/3 Romex — $470K/yr Amazon US Niche (2026) - Flapen"
---
# **8/3 romex**
**Skip it**
Strong incumbent ratings (4.7★) — this niche doesn't clear our bar today.
Market size 58Growth 22Conversion 41Competition 47Returns 42Price range 28Avg price 62Brand share 33Review moat 94Quality gap 17
**Review moat**
**Great****128.65**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Good****$139.67**
avg listing price — sweet spot $15–$100
**Market size**
**Good****$470K**
$470K/yr · 103K searches
**Competition**
**Okay****57%**
top-5 click share — leaders hold, buyers still browse
**Returns**
**Okay****3.7%**
return rate — above 5% kills the launch gate
**Conversion**
**Okay****3.3%**
search→purchase rate — share of searches ending in a sale
**Brand share**
**Okay****85%**
top-5 brand share — brands hold most of the demand
**Price range**
**Okay****$25.50–$293.18**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Bad****-5.5%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Signals**[** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
According to Flapen's Amazon United States niche tracking, 8/3 romex is a $470K/yr Amazon United States market (103K searches/yr). The top 5 brands hold 85% of demand. Verdict: Skip it — 41/100.
Data updated Jul 27, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **8/3 romex market data**
- **Units sold / yr**
- **3K–4K**
- avg 100–250/product
- **Revenue / yr**
- **$419K–$559K**
- units × avg price
- **Conversion rate**
- **3.3%**
- **Avg BSR**
- **#386**
- **Page quality**
- **0%**
- **Prime**
- **88%**
- **Sponsored**
- **81%**
- **Out of stock**
- **6.5%**
- **Avg brand age**
- **51 months**
- **Avg seller age**
- **147 days**
## **Competition & brand share**
The top 5 products take 57% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**10 **▼falling
**Sellers**
**32**
**Top-5 brand share**
**85%**
Top 20: 100%
**Top-5 click share**
**57%**
Top 20: 94%
**Open market**
**8%**
- Southwire26% - XMK24% - energeaster22% - VN Infinite quality7% - Woods6% - wirenco6% - Open — no brand owns it (4 brands, 8%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -5.5% search growth over the last 90 days.
3K2KSpike '24Spike '25Prime Day '25Holiday '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.3×
[**Open Trend **](https://flapen.com/research/us/tools-home-improvement/8-3-romex/trend)
## **Top 8/3 romex search terms**
- **8/3 romex**36K/yr-15.4%3.7% conv. - **8/3 wire**21K/yr+0.7%2.0% conv. - **8/3 wire with ground**16K/yr-6.5%2.5% conv. - **8-3 wire**4K/yr+39.8%2.1% conv. - **8/3 romex 50 ft**4K/yr-7.8%4.8% conv. - **8-3 wire with ground**7K/yr-28.5%1.8% conv. - **8-3 romex**3K/yr+28.6%3.1% conv. - **8/3 romex 75 ft**4K/yr-10.7%5.4% conv. - **8 3 wire**3K/yr+85.0%1.4% conv. - **8/3 romex 100 ft**3K/yr+7.5%1.6% conv. [**All search terms **](https://flapen.com/research/us/tools-home-improvement/8-3-romex/search-terms)
## **Top 8/3 romex products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%4%$19K8%$38K12%$56K16%$75K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**50ft NM-B 8/3 Wire with Ground 8/3 8 Gauge 3 Conductor Wire 8-3 Copper 8 AWG Non-Metallic Sheathed 8/3 NM-B W/G Cable Stranded Indoor Residential Electrical Wiring for Branch Circuit Switches&Outlets**XMK**$141.01**4.8★88 rev](https://www.amazon.com/dp/B0FCFR6BL1) [2**SOUTHWIRE COMPANY LL 63949202 Romex Type Nm-B Wg Non-Metallic Wire 125 ft. 8/3 Black**Southwire**$283.94**4.5★65 rev](https://www.amazon.com/dp/B001B158FY) [3**Southwire 75 ft. 8/3 NM-B Stranded Indoor Residential Electrical Wire - Black**Southwire**$191.06**4.8★286 rev](https://www.amazon.com/dp/B00J9PZ97Q) [4**Solid Indoor 8/3 Type NM-B Pure Copper Cable 25FT Black 8 AWG 3 Conductors with Ground Wire**energeaster**$66.07**4.9★18 rev](https://www.amazon.com/dp/B0G41C5ZR9) [5**Solid Indoor 8/3 Type NM-B Pure Copper Cable 50FT Black 8 AWG 3 Conductors with Ground Wire**energeaster**$138.95**4.9★18 rev](https://www.amazon.com/dp/B0G417KC6K)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**15ft NM-B 8/3 Wire with Ground 8/3 8 Gauge 3 Conductor Wire 8-3 Copper 8 AWG Non-Metallic Sheathed 8/3 NM-B W/G Cable Stranded Indoor Residential Electrical Wiring for Branch Circuit Switches&Outlets**XMK**$52.14**88 rev6mo ago](https://www.amazon.com/dp/B0GG44KT95) [**35ft NM-B 8/3 Wire with Ground 8/3 8 AWG Copper Wire 8 Gauge 3 Conductor Non-Metallic Sheathed 8/3 NM-B Cable with Ground Stranded Indoor Residential Electrical Wiring for Branch Circuit Switch&Outlet**XMK**$117.08**88 rev6mo ago](https://www.amazon.com/dp/B0GG4JGFXT) [**Solid Indoor 8/3 Type NM-B Pure Copper Cable 125FT White 8 AWG 3 Conductors with Ground Wire**energeaster**$293.18**18 rev8mo ago](https://www.amazon.com/dp/B0G42TP8BQ) [**Solid Indoor 8/3 Type NM-B Pure Copper Cable 25FT Black 8 AWG 3 Conductors with Ground Wire**energeaster**$66.07**18 rev8mo ago](https://www.amazon.com/dp/B0G41C5ZR9) [**Solid Indoor 8/3 Type NM-B Pure Copper Cable 50FT Black 8 AWG 3 Conductors with Ground Wire**energeaster**$138.95**18 rev8mo ago](https://www.amazon.com/dp/B0G417KC6K)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Solid Indoor 8/3 Type NM-B Pure Copper Cable 125FT White 8 AWG 3 Conductors with Ground Wire**energeaster**$293.18**4.9★**▲ 252%**](https://www.amazon.com/dp/B0G42TP8BQ) [**Solid Indoor 8/3 Type NM-B Pure Copper Cable 50FT Black 8 AWG 3 Conductors with Ground Wire**energeaster**$138.95**4.9★**▲ 248%**](https://www.amazon.com/dp/B0G417KC6K) [**Solid Indoor 8/3 Type NM-B Pure Copper Cable 25FT Black 8 AWG 3 Conductors with Ground Wire**energeaster**$66.07**4.9★**▲ 247%**](https://www.amazon.com/dp/B0G41C5ZR9) [**Solid Indoor 8/3 Type NM-B Pure Copper Cable 75FT Black 8 AWG 3 Conductors with Ground Wire**energeaster**$205.44**4.9★**▲ 246%**](https://www.amazon.com/dp/B0G4189D2R) [**VN Infinite quality 8/3 NM-B Non-Metallic Sheathed Cable Stranded Residential Indoor Wire (50 Ft)**VN Infinite quality**$140.92**4.5★**▲ 226%**](https://www.amazon.com/dp/B0D9KZW619)
**~~View all trending →~~**
## **What buyers say about 8/3 romex**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Advertised Vs Actual Product**30%
*“As advertised”*
**Quality-Overall**28%
*“Good quality wires”*
**Value For Money**28%
*“Save money where you can”*
**Size-Overall**3%
*“I was sure I could make it fit”*
**Connectivity-Overall**2%
*“Cable works great”*
**Ease Of Cleaning**1%
*“The conductors strip cleanly”*
**Durability**1%
*“the sheathing held up nicely”*
### **What buyers complain about **
**Advertised Vs Actual Product**25%
*“Deceptive advertising”*
**Heating**13%
*“Ended up being a pain to run as I heat bent the 1/2 PVC during the initial installation”*
**Ease Of Use**13%
*“Not the easiest to manipulate”*
**Value For Money**13%
*“It's pretty pricey”*
**Size-Overall**13%
*“would not fit past the heat bend”*
### **Top return reasons **
**Size-Overall**32%
**Advertised Vs Actual Product**24%
**Value For Money**19%
**Functionality-Overall**5%
**Quality-Overall**4%
**Flexibility**2%
**Compatibility-Overall**2%
**Material Quality**2%
**Strength**1%
**Ease Of Use**1%
## **Common questions**
- **Is 8/3 romex profitable to sell on Amazon United States?**
- The niche generates $470K/yr across 26 tracked products. 4 of 6 products launched in the last 360 days are still selling. 90-day search growth is -5.5%. Flapen's verdict: Skip it (41/100).
- **How competitive is the 8/3 romex niche?**
- 10 brands and 32 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 85% of demand.
- **What do buyers complain about in 8/3 romex?**
- Top complaints mined from reviews: Advertised Vs Actual Product, Heating, Ease Of Use. The return rate is 3.7%.
- **When does demand for 8/3 romex peak?**
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- **What does it cost to enter the 8/3 romex niche?**
- Listings span $25.50–$293.18; the average listing price is $139.67 (sweet spot $15–$100). The average incumbent carries 129 reviews — the moat a new listing must climb.
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