Use and Care Manual

INDOOR WIRE (NM-B)
APPLICATIONS GAUGE
/
COND.
Fan With Light 12/3
Central Air Conditioner 30 Amps 10/3
Central Air Conditioner 40 Amps 8/3
Combination Switch & Outlet* 14/2
Cook Top Apt Size – up to 30 Amps 10/3
Dishwasher 12/2
Disposal 12/2
Double Oven Apt Size – up to 30 Amps 10/3
Double Oven Range up to 40 Amps – Copper 8/3
Double Oven Range up to 55 Amps – Copper 6/3
Electric Dryer up to 30 Amps 10/3
Electric Range up to 50 Amps 6/3
Electric Wall Heater up to 1920 Watts at 120V 12/2
Electric Wall Heater up to 2880 Watts at 120V 10/2
Exhaust Fan* 14/2
Gas Furnace Fan Circuit* 14/2
Grounded Outlet Small Appliances 12/2
Lighted Medicine Cabinet* 14/2
Lighting Fixture* 14/2
Lighting Fixture with Outlets* 14/2
Portable Air Compressor 12/2
Room Air Conditioner up to 20 Amps 12/2
Single Oven Built-In up to 30 Amps 10/3
Wall Light Switch* 14/2
Water Heater 10/2
3-Way Light Switch up to 15 Amps* 14/3
3-Way Light Switch up to 20 Amps 12/3
*Local codes may require a minimum 12/2 with ground
OUTDOOR WIRE (UF-B)
APPLICATIONS GAUGE
/
COND.
Detached Building 120V 10/2
Detached Building 240V 10/3
Dusk to Dawn Light* 14/2
Outdoor Post Light with Outlet 12/2
Patio/Pool Waterproof Outlet 12/2
Patio Spotlight* 14/2
Sub Panel 40 Amp – for runs over 75 ft use one size larger 8/3
Sub Panel 55 Amp – for runs over 75 ft use one size larger 6/3
Switch & Grounded Outlet 12/2
Water Fountain 6/3
COPPER
COPPER
ALUM
ALUM
WIRE SIZE
(AWG)
WIRE SIZE
(AWG)
14 12 10 8 6 4 3 2 1 1
/
0 2
/
0 3
/
0 4
/
0
AMPS:
15 20 30 40 55 70 85 95 110 125 145 165 195
15 20 30 40 55 70 85 95 110 150 175 200 230
n / a 15 25 35 40 55 65 75 85 120 135 155 180
WARNING: Installation of electrical wire can be hazardous, and if
done improperly can result in personal injury or property damage.
For safe wiring practices, consult the National Electrical Code,
®
your
local building inspector, or a qualified electrician.
*110 Volt, Single Phase, Max 3% Voltage Drop. Recommended maximum circuit lengths is best for
voltage systems of 120 volts. For 240-volt systems, circuit lengths may be doubled. Note: Extremely long
circuits can produce voltage losses whereby electrical equipment may not operate properly. Following these
recommended values should provide reasonable efficiency of operations. Conductor sizes may be further
limited by termination temperature ampacity limitations.
15 20 30 40 50 60 70 80 90 100
14 35
12 60 45
10 95 70 45
8 155 115 75 55
6 245 185 120 90 70
4 390 295 195 145 115 95 80
2 625 469 310 230 185 155 130 115 100 90
6 150 110 75 55 45
4 235 175 120 90 70 55 50
2 380 285 190 140 110 95 80 70 60 55
©2020 Cerrowire
A Marmon/Berkshire Hathaway Company
POWER UP WITH THE RIGHT WIRE – CERROWIRE
CORD
GAUGE
/
COND.
APPLICATIONS & PRODUCT NAME
Door Bell 20/2 Bell Wire
Lamp Wire 18/2 or 16/2 SPT
Landscape Light 10, 12, 14 or 16 Landscape Cord
Security/Fire Alarm 18/2, 18/4, 22/2
or 22/4 Security Wire
Sprinkler System 18/4, 18/5 or 18/7 Sprinkler Wire
Thermostat 18/2, 3, 5 or 7 Thermostat Wire
Based on 2017 NEC Table 310.15(B)(16) and 110.14(C)(1)
1
NM-B, UF and TW are limited to 60˚C
2
RHW, RHH, THHN, THWN, XHHW, SER and SEU are assumed at 60˚C for 1 AWG and smaller,
75˚C for larger
Note: a) For all wire types except TW, the 90˚C column in NEC Table 310.15(B)(16) may be used for
ambient temperature correction and/or ampacity adjustment for number of current-carrying conduc-
tors. b) Ampacities in this table are based on conservative assumptions of equipment termination
temperatures. For wire types other than NM-B, UF, and TW, if a higher termination temperature is
present at both connections, the higher ampacity based on the actual termination temperatures may
be used.
RATING OF CIRCUIT BREAKER OR FUSE IN AMPERES
AMPERAGE RATINGS* (for 90°C rating)
RECOMMENDED CIRCUIT LENGTHS FOR VOLTAGE DROP*
NM-B, UF,
TW
1
RHH, RHW,
THHN, THWN
XHHW, SER,
SEU
2
RHH, RHW,
THHN, THWN
XHHW, SER,
SEU
2
100 4 2
110 3 1
125 2 1/0
150 1 2/0
175 1/0 3/0
200 2/0 4/0
225 3/0 250
250 4/0 300
300 250 350
350 350 500
400 400 600
SERVICE RATING
(AMPS)
COPPER SIZE
(AWG OR KCMIL)
ALUMINUM SIZE
(AWG OR KCMIL)
AMPACITY ALLOWANCE FOR
3-WIRE SINGLE PHASE DWELLING SERVICES
Ampacities based on 2020 NEC Table 310.12