Electrical Materials List Builder
6 AWG copper on a 60A breaker, THHN in EMT (75°C terminations), 50 ft one-way. Voltage drop 0.98% at 48A.
- 6 AWG THHN/THWN-2 copper, 2 hots (black + red)65 ft each, 130 ft total
Smallest copper size whose Table 310.16 ampacity (65A at 75°C) covers the 60A breaker. 75°C column: wire, breaker and equipment all marked 75°C (110.14(C)(1)(a)). NEC Table 310.16, 110.14(C), 240.4(D)
Search Amazon for this (paid link) - 10 AWG THHN/THWN-2 copper, ground (green)65 ft
Table 250.122 minimum for a 60A breaker is 10 AWG copper. NEC Table 250.122
Search Amazon for this (paid link) - 3/4 in. EMT conduit5 x 10 ft sticks, plus couplings and connectors
Smallest trade size that keeps 2 x 6 AWG + 1 x 10 AWG THHN at or under 40% fill (23% here). NEC Chapter 9 Tables 1, 4, 5
Search Amazon for this (paid link) - 60A 2-pole breaker1, match your panel brand
48A charger is a continuous load: 125% = 60A, next standard size 60A. NEC 625.41, 625.42
Search Amazon for this (paid link) - Level 2 EV charger (hardwired)48A rated
The charger sets the circuit: this list is sized for a charger set to 48A. NEC 625.41
Search Amazon for this (paid link) - GFCINot a separate breaker for a hardwired charger
625.54 requires GFCI on EV charging receptacles. A listed hardwired charger has its own ground-fault protection, so no GFCI breaker is added upstream. NEC 625.54
Voltage drop: 0.98% for 6 AWG over 50 ft at 48A, within the 3% recommendation (210.19(A) Informational Note No. 4).
Paid links. As an Amazon Associate WireRef earns from qualifying purchases. Amazon search results mix sizes and types: check each listing matches the line it came from.
How the list is built
- Breaker. EV chargers: 125% of the charger rating, rounded up to the next standard size (625.41, 240.6(A)). Ranges, dryers, water heaters, spas and subpanels: the breaker in WireRef's circuit data for that project. Central AC: the nameplate MOCP you enter.
- Wire size. The smallest copper size whose Table 310.16 ampacity covers the breaker (or the AC nameplate MCA), after skipping sizes the 240.4(D) small-conductor limits rule out (14 AWG 15A, 12 AWG 20A, 10 AWG 30A). NM-B uses the 60°C column (334.80). Wires in conduit use the 75°C column only when you say the breaker and equipment are marked 75°C; otherwise 60°C (110.14(C)(1)(a)). This is the same search the wire size pages use.
- Ground wire. Table 250.122 by breaker size. If you upsize the hots for voltage drop, the ground grows in proportion to circular mils (250.122(B)).
- Conduit. The smallest EMT or PVC Schedule 40 trade size that keeps the hots, neutral and an insulated THHN ground at or under 40% fill (Chapter 9 Tables 1, 4 and 5). The neutral is counted full size.
- Wire length. WireRef's buying allowance, not an NEC rule: one-way run + 10% for routing + 3 ft at each end for terminations, rounded up to the next 5 ft. Conduit is counted in 10 ft sticks for the one-way run. Fittings, boxes, straps and connectors are not counted.
- Voltage drop. 2 × I × R × L / 1000 with Chapter 9 Table 8 resistance, using the load this site's project pages use for that circuit. Above 3% the list says so and names the size that brings it under (210.19(A) Informational Note No. 4). It is a recommendation, not a requirement.
- Devices. Only what the project data cites: GFCI where the project page requires it, the receptacle type, the disconnect within sight, subpanel ground bar and grounding electrode.
Every line links to an Amazon search for that item. There is no single cart: breakers must match your panel brand, and wire is sold in many lengths, so pick each line yourself. Use Copy list to take it to the store or Print for the job file.
Pre-computed materials lists
Common projects at typical run lengths, computed with the same rules as the builder. Each list states the termination rating it assumes; where the project guide and the wire size page lead with the 60°C answer (the 50A spa), so does the list. Paid links: as an Amazon Associate WireRef earns from qualifying purchases.
EV charger, 48A (hardwired), 50 ft run, THHN in EMT
6 AWG copper on a 60A breaker, THHN in EMT (75°C terminations), 50 ft one-way. Voltage drop 0.98% at 48A.
- 6 AWG THHN/THWN-2 copper, 2 hots (black + red)65 ft each, 130 ft total
Smallest copper size whose Table 310.16 ampacity (65A at 75°C) covers the 60A breaker. 75°C column: wire, breaker and equipment all marked 75°C (110.14(C)(1)(a)). NEC Table 310.16, 110.14(C), 240.4(D)
Search Amazon for this (paid link) - 10 AWG THHN/THWN-2 copper, ground (green)65 ft
Table 250.122 minimum for a 60A breaker is 10 AWG copper. NEC Table 250.122
Search Amazon for this (paid link) - 3/4 in. EMT conduit5 x 10 ft sticks, plus couplings and connectors
Smallest trade size that keeps 2 x 6 AWG + 1 x 10 AWG THHN at or under 40% fill (23% here). NEC Chapter 9 Tables 1, 4, 5
Search Amazon for this (paid link) - 60A 2-pole breaker1, match your panel brand
48A charger is a continuous load: 125% = 60A, next standard size 60A. NEC 625.41, 625.42
Search Amazon for this (paid link) - Level 2 EV charger (hardwired)48A rated
The charger sets the circuit: this list is sized for a charger set to 48A. NEC 625.41
Search Amazon for this (paid link) - GFCINot a separate breaker for a hardwired charger
625.54 requires GFCI on EV charging receptacles. A listed hardwired charger has its own ground-fault protection, so no GFCI breaker is added upstream. NEC 625.54
Voltage drop: 0.98% for 6 AWG over 50 ft at 48A, within the 3% recommendation (210.19(A) Informational Note No. 4).
EV charger, 48A (hardwired), 50 ft run, NM-B
4 AWG copper on a 60A breaker, NM-B, 50 ft one-way. Voltage drop 0.62% at 48A.
- 4/2 NM-B cable with ground (copper)65 ft
Smallest copper size whose Table 310.16 ampacity (70A at 60°C) covers the 60A breaker. NM-B is limited to the 60°C column (334.80). The cable's ground must be at least 10 AWG (Table 250.122). NEC Table 310.16, 334.80, 250.122
Search Amazon for this (paid link) - 60A 2-pole breaker1, match your panel brand
48A charger is a continuous load: 125% = 60A, next standard size 60A. NEC 625.41, 625.42
Search Amazon for this (paid link) - Level 2 EV charger (hardwired)48A rated
The charger sets the circuit: this list is sized for a charger set to 48A. NEC 625.41
Search Amazon for this (paid link) - GFCINot a separate breaker for a hardwired charger
625.54 requires GFCI on EV charging receptacles. A listed hardwired charger has its own ground-fault protection, so no GFCI breaker is added upstream. NEC 625.54
Voltage drop: 0.62% for 4 AWG over 50 ft at 48A, within the 3% recommendation (210.19(A) Informational Note No. 4).
EV charger, 40A (hardwired), 40 ft run, NM-B
6 AWG copper on a 50A breaker, NM-B, 40 ft one-way. Voltage drop 0.65% at 40A.
- 6/2 NM-B cable with ground (copper)50 ft
Smallest copper size whose Table 310.16 ampacity (55A at 60°C) covers the 50A breaker. NM-B is limited to the 60°C column (334.80). The cable's ground must be at least 10 AWG (Table 250.122). NEC Table 310.16, 334.80, 250.122
Search Amazon for this (paid link) - 50A 2-pole breaker1, match your panel brand
40A charger is a continuous load: 125% = 50A, next standard size 50A. NEC 625.41, 625.42
Search Amazon for this (paid link) - Level 2 EV charger (hardwired)40A rated
The charger sets the circuit: this list is sized for a charger set to 40A. NEC 625.41
Search Amazon for this (paid link) - GFCINot a separate breaker for a hardwired charger
625.54 requires GFCI on EV charging receptacles. A listed hardwired charger has its own ground-fault protection, so no GFCI breaker is added upstream. NEC 625.54
Voltage drop: 0.65% for 6 AWG over 40 ft at 40A, within the 3% recommendation (210.19(A) Informational Note No. 4).
EV charger, 32A (hardwired), 60 ft run, THHN in EMT
8 AWG copper on a 40A breaker, THHN in EMT (75°C terminations), 60 ft one-way. Voltage drop 1.24% at 32A.
- 8 AWG THHN/THWN-2 copper, 2 hots (black + red)75 ft each, 150 ft total
Smallest copper size whose Table 310.16 ampacity (50A at 75°C) covers the 40A breaker. 75°C column: wire, breaker and equipment all marked 75°C (110.14(C)(1)(a)). NEC Table 310.16, 110.14(C), 240.4(D)
Search Amazon for this (paid link) - 10 AWG THHN/THWN-2 copper, ground (green)75 ft
Table 250.122 minimum for a 40A breaker is 10 AWG copper. NEC Table 250.122
Search Amazon for this (paid link) - 1/2 in. EMT conduit6 x 10 ft sticks, plus couplings and connectors
Smallest trade size that keeps 2 x 8 AWG + 1 x 10 AWG THHN at or under 40% fill (31% here). NEC Chapter 9 Tables 1, 4, 5
Search Amazon for this (paid link) - 40A 2-pole breaker1, match your panel brand
32A charger is a continuous load: 125% = 40A, next standard size 40A. NEC 625.41, 625.42
Search Amazon for this (paid link) - Level 2 EV charger (hardwired)32A rated
The charger sets the circuit: this list is sized for a charger set to 32A. NEC 625.41
Search Amazon for this (paid link) - GFCINot a separate breaker for a hardwired charger
625.54 requires GFCI on EV charging receptacles. A listed hardwired charger has its own ground-fault protection, so no GFCI breaker is added upstream. NEC 625.54
Voltage drop: 1.24% for 8 AWG over 60 ft at 32A, within the 3% recommendation (210.19(A) Informational Note No. 4).
Electric range, 50A, 40 ft run, NM-B
6 AWG copper on a 50A breaker, NM-B, 40 ft one-way. Voltage drop 0.65% at 40A.
- 6/3 NM-B cable with ground (copper)50 ft
Smallest copper size whose Table 310.16 ampacity (55A at 60°C) covers the 50A breaker. NM-B is limited to the 60°C column (334.80). The cable's ground must be at least 10 AWG (Table 250.122). NEC Table 310.16, 334.80, 250.122
Search Amazon for this (paid link) - 50A 2-pole breaker1, match your panel brand
Standard range circuit in this site's circuit data (Electric Range/Oven (50A)). NEC 210.19(A)(3), 220.55
Search Amazon for this (paid link) - NEMA 14-50 receptacle4-wire, matches the range cord
New installations use a 4-wire receptacle; 3-wire is existing-only. NEC 250.140
Search Amazon for this (paid link)
Voltage drop: 0.65% for 6 AWG over 40 ft at 40A, within the 3% recommendation (210.19(A) Informational Note No. 4).
Electric dryer, 30A, 40 ft run, NM-B
10 AWG copper on a 30A breaker, NM-B, 40 ft one-way. Voltage drop 0.99% at 24A.
- 10/3 NM-B cable with ground (copper)50 ft
Smallest copper size whose Table 310.16 ampacity (30A at 60°C) covers the 30A breaker. NM-B is limited to the 60°C column (334.80). The cable's ground must be at least 10 AWG (Table 250.122). NEC Table 310.16, 334.80, 250.122
Search Amazon for this (paid link) - 30A 2-pole GFCI breaker1, match your panel brand
Standard dryer circuit in this site's circuit data (Electric Dryer (30A)). GFCI protection is required for this circuit (NEC 210.8(A)(10)). NEC 220.54, 210.8(A)(10)
Search Amazon for this (paid link) - NEMA 14-30 receptacle4-prong
4-prong receptacle required for new installations. NEC 250.140
Search Amazon for this (paid link)
Voltage drop: 0.99% for 10 AWG over 40 ft at 24A, within the 3% recommendation (210.19(A) Informational Note No. 4).
Tank water heater, 30A, 30 ft run, NM-B
10 AWG copper on a 30A breaker, NM-B, 30 ft one-way. Voltage drop 0.59% at 19A.
- 10/2 NM-B cable with ground (copper)40 ft
Smallest copper size whose Table 310.16 ampacity (30A at 60°C) covers the 30A breaker. NM-B is limited to the 60°C column (334.80). The cable's ground must be at least 10 AWG (Table 250.122). NEC Table 310.16, 334.80, 250.122
Search Amazon for this (paid link) - 30A 2-pole breaker1, match your panel brand
Water heaters are continuous loads; this site's circuit data uses a 30A breaker for the standard 4500W tank. NEC 422.13
Search Amazon for this (paid link) - Disconnecting meansWithin sight, or a breaker lockable open
A hardwired water heater needs a disconnect within sight of it, or a breaker that can be locked in the open position. NEC 422.31
Search Amazon for this (paid link) - GFCICord-and-plug units only
210.8(D) requires GFCI for cord-and-plug connected water heaters. A hardwired unit is exempt, though some jurisdictions read it more broadly: ask your inspector. NEC 210.8(D)
Voltage drop: 0.59% for 10 AWG over 30 ft at 19A, within the 3% recommendation (210.19(A) Informational Note No. 4).
Hot tub / spa, 50A, 60 ft run, THWN-2 in PVC
6 AWG copper on a 50A breaker, THWN-2 in PVC (60°C terminations), 60 ft one-way. Voltage drop 1.23% at 50A.
- 6 AWG THWN-2 copper, 2 hots (black + red)75 ft each, 150 ft total
Smallest copper size whose Table 310.16 ampacity (55A at 60°C) covers the 50A breaker. 60°C column: terminations not marked 75°C (110.14(C)(1)(a)). NEC Table 310.16, 110.14(C), 240.4(D)
Search Amazon for this (paid link) - 6 AWG THWN-2 copper, neutral (white)75 ft
This site's hot tub data runs a neutral (6/3 with ground). Leave it out only if the spa manual shows a 240V-only connection. Shown full size, same as the hots. NEC 680.42
Search Amazon for this (paid link) - 10 AWG THWN-2 copper, ground (green)75 ft
Table 250.122 minimum for a 50A breaker is 10 AWG copper. NEC Table 250.122
Search Amazon for this (paid link) - 3/4 in. PVC Schedule 40 conduit6 x 10 ft sticks, plus couplings and connectors
Smallest trade size that keeps 3 x 6 AWG + 1 x 10 AWG THHN at or under 40% fill (34.1% here). NEC Chapter 9 Tables 1, 4, 5
Search Amazon for this (paid link) - 50A 2-pole GFCI breaker1, match your panel brand
Breaker size comes from the spa's installation manual; this list is for a spa rated 50A. GFCI protection is required for this circuit (NEC 680.44). NEC 680.42, 680.44
Search Amazon for this (paid link) - Spa disconnectWithin sight of the spa
A disconnect within sight of the spa is required. NEC 680.12
Search Amazon for this (paid link) - Underground warning tape (if buried)75 ft
Minimum cover for PVC is 18 in. in Table 300.5(A), Column 3 (all locations not otherwise listed). Tape is not NEC-required but is recommended. Underground raceways are wet locations, so the wire must be wet-rated (300.5(B)). NEC Table 300.5(A), 300.5(B)
Search Amazon for this (paid link)
Voltage drop: 1.23% for 6 AWG over 60 ft at 50A, within the 3% recommendation (210.19(A) Informational Note No. 4).
Subpanel feeder, 60A, 75 ft run, THHN in EMT
6 AWG copper on a 60A breaker, THHN in EMT (75°C terminations), 75 ft one-way. Voltage drop 1.47% at 48A.
- 6 AWG THHN/THWN-2 copper, 2 hots (black + red)90 ft each, 180 ft total
Smallest copper size whose Table 310.16 ampacity (65A at 75°C) covers the 60A breaker. 75°C column: wire, breaker and equipment all marked 75°C (110.14(C)(1)(a)). NEC Table 310.16, 110.14(C), 240.4(D)
Search Amazon for this (paid link) - 6 AWG THHN/THWN-2 copper, neutral (white)90 ft
Subpanel feeders are 4-wire: two hots, neutral, ground. Shown full size, same as the hots. NEC 250.24(A)(5)
Search Amazon for this (paid link) - 10 AWG THHN/THWN-2 copper, ground (green)90 ft
Table 250.122 minimum for a 60A breaker is 10 AWG copper. NEC Table 250.122
Search Amazon for this (paid link) - 3/4 in. EMT conduit8 x 10 ft sticks, plus couplings and connectors
Smallest trade size that keeps 3 x 6 AWG + 1 x 10 AWG THHN at or under 40% fill (32.5% here). NEC Chapter 9 Tables 1, 4, 5
Search Amazon for this (paid link) - 60A 2-pole breaker1, match your panel brand
Feeder breaker in the main panel for a 60A subpanel feed. NEC 215.2(A), 240.4
Search Amazon for this (paid link) - Subpanel (load center)Bus rated at least 60A
The panel must be rated for the feeder breaker that protects it. NEC 408.36
Search Amazon for this (paid link) - Ground bar kitSeparate from the neutral bar
In a subpanel the neutral and ground bars stay separate (no bonding screw). NEC 250.24(A)(5)
Search Amazon for this (paid link) - Grounding electrode (detached building only)Ground rod and clamp at the building
A subpanel in a detached building needs its own grounding electrode. NEC 250.32
Search Amazon for this (paid link)
Voltage drop: 1.47% for 6 AWG over 75 ft at 48A, within the 3% recommendation (210.19(A) Informational Note No. 4).
Subpanel feeder, 100A, 150 ft run, THWN-2 in PVC
3 AWG copper on a 100A breaker, THWN-2 in PVC (75°C terminations), 150 ft one-way. Voltage drop 2.45% at 80A.
- 3 AWG THWN-2 copper, 2 hots (black + red)175 ft each, 350 ft total
Smallest copper size whose Table 310.16 ampacity (100A at 75°C) covers the 100A breaker. 75°C column: wire, breaker and equipment all marked 75°C (110.14(C)(1)(a)). NEC Table 310.16, 110.14(C), 240.4(D)
Search Amazon for this (paid link) - 3 AWG THWN-2 copper, neutral (white)175 ft
Subpanel feeders are 4-wire: two hots, neutral, ground. Shown full size, same as the hots. NEC 250.24(A)(5)
Search Amazon for this (paid link) - 8 AWG THWN-2 copper, ground (green)175 ft
Table 250.122 minimum for a 100A breaker is 8 AWG copper. NEC Table 250.122
Search Amazon for this (paid link) - 1 in. PVC Schedule 40 conduit15 x 10 ft sticks, plus couplings and connectors
Smallest trade size that keeps 3 x 3 AWG + 1 x 8 AWG THHN at or under 40% fill (39.5% here). NEC Chapter 9 Tables 1, 4, 5
Search Amazon for this (paid link) - 100A 2-pole breaker1, match your panel brand
Feeder breaker in the main panel for a 100A subpanel feed. NEC 215.2(A), 240.4
Search Amazon for this (paid link) - Subpanel (load center)Bus rated at least 100A
The panel must be rated for the feeder breaker that protects it. NEC 408.36
Search Amazon for this (paid link) - Ground bar kitSeparate from the neutral bar
In a subpanel the neutral and ground bars stay separate (no bonding screw). NEC 250.24(A)(5)
Search Amazon for this (paid link) - Grounding electrode (detached building only)Ground rod and clamp at the building
A subpanel in a detached building needs its own grounding electrode. NEC 250.32
Search Amazon for this (paid link) - Underground warning tape (if buried)175 ft
Minimum cover for PVC is 18 in. in Table 300.5(A), Column 3 (all locations not otherwise listed). Tape is not NEC-required but is recommended. Underground raceways are wet locations, so the wire must be wet-rated (300.5(B)). NEC Table 300.5(A), 300.5(B)
Search Amazon for this (paid link)
Voltage drop: 2.45% for 3 AWG over 150 ft at 80A, within the 3% recommendation (210.19(A) Informational Note No. 4).
Frequently asked questions
Why does NM-B need a bigger wire than THHN in conduit?
NEC 334.80 limits NM-B cable to the 60°C ampacity column. For a 48A EV charger on a 60A breaker that means 4 AWG NM-B, against 6 AWG THHN in conduit when the breaker and charger terminals are marked 75°C.
How much extra wire should I buy?
This builder adds 10% to the one-way run for bends and routing, plus 3 ft at each end to reach the terminals, and rounds up to the next 5 ft. That is a buying allowance, not a code rule. Measure your actual route before you buy.
Does the ground wire get bigger if I upsize for voltage drop?
Yes. NEC 250.122(B) requires the equipment grounding conductor to be increased in proportion to the circular-mil area of the upsized hots. The builder does that automatically when you tick the upsize box.
Is this list enough to pass inspection?
It covers the wire, protection and the devices the code data names. Your jurisdiction may have adopted a different NEC edition or local amendments, and the equipment manual can set a different breaker. 9 states now enforce NEC 2026; check your state and your inspector.
NEC 2023 references verified February 2026