30 Amp 120/240-Volt 240-Watt Fused AC Disconnect.
How many amps is an AC disconnect?
Non Metallic – Fusible Disconnects
Fusible disconnects are available in 30 and 60 Ampere models.
What size breaker do I need for AC disconnect?
It depends on the unit that’s being installed, but usually it’s 30-60 Amp with 10-4 AWG wire. You’ll be in the 30-40A range if you look at a 3.5 ton unit.
How many amps do you need to run central air?
Central air conditioning units require 208/240 volts. They must be hard wired and have a dedicated circuit. Units require anywhere from 15-60 amps depending on how many tons they are.
What size fuses for 30 amp AC disconnect?
2 fuses
The GE 30 Amp 120/240 Volt 240 Watt Fused (requires 2 fuses installed on the back side of the puller). AC disconnect has a NEMA 3R rated steel enclosure that is both rust and corrosion resistant for outdoor use.
Can you use a 60 amp disconnect on a 30 amp circuit?
As long as the circuit is on the proper size breaker, there’s nothing wrong with using a 60 AmpDisconnect on a 30 Amp unit. The standard size for a/c pullouts is 60 Amp.
Can I use a 60 amp disconnect on a 40 amp breaker?
Yes, you can install a 60 Amp disconnect and feed it from a 40 Amp circuit breaker.
Can I use a 30 amp disconnect for a 20 amp breaker?
If it is a fused disconnect it will hold up to 30 amp fuses. If it has fuses just use 20 amp fuses, they will work as they are supposed to. Size the wires appropriately, usually 12 gauge for a 20 amp circuit and use a 20 amp circuit breaker.
How do you size a disconnect?
How to Calculate the Electrical Disconnect Switch Size
- Examine the appliance manufacturer nameplate on the appliance. Determine the horsepower rating of the appliance. …
- Convert from volt-amps, watts or kilowatts to horsepower. …
- Select a disconnect switch with the same or greater horsepower rating as the appliance.
How many amps does a 18000 BTU air conditioner use?
8 Amps
An 18,000 BTU air conditioner is capable of drawing about 8 Amps of power.
How far off the ground does a disconnect have to be?
Minimum mounting height is not mandated by the NEC. When in its highest position, the center of the operating handle of the switch or circuit breaker should not be more than 6 ft 7 in.
What are the standard disconnect sizes?
The most commonly seen disconnects come in staged amperage sizes of 30, 60, 100, 200 and 400 amps. There also are 600-, 800- and 1,200-amp sizes, but these are very large and are usually found on the power one-line diagram. Each step up in size carries a large increase in both material and labor costs.
Do they make a 40 amp disconnect?
The top-selling product within Disconnects is the Midwest Electric Products 40 Amp 240-Volt Fused Evaporative Cooler Disconnect.
Can I use a 30 amp disconnect on a 20 amp circuit?
If it is a fused disconnect it will hold up to 30 amp fuses. If it has fuses just use 20 amp fuses, they will work as they are supposed to. Size the wires appropriately, usually 12 gauge for a 20 amp circuit and use a 20 amp circuit breaker.
What is code for AC disconnect?
NEC 440.13 disconnect for room air conditioners or heat pumps – paraphrasing: the air conditioner or heat pump unit disconnect must be within sight from and readily accessible from the unit.
Can I use a 60 amp disconnect on a 40 amp breaker?
Yes, you can install a 60 Amp disconnect and feed it from a 40 Amp circuit breaker.
Can I use a 60 amp disconnect on a 30 amp breaker?
As long as the circuit is on the proper size breaker, there’s nothing wrong with using a 60 AmpDisconnect on a 30 Amp unit.
What size breaker do I need for AC disconnect?
It depends on the unit that’s being installed, but usually it’s 30-60 Amp with 10-4 AWG wire. You’ll be in the 30-40A range if you look at a 3.5 ton unit.
Which type of disconnect should be used on a 30 amp circuit?
30 Amp 120/240-Volt 240-Watt Fused AC Disconnect.
Do they make a 15 amp disconnect?
Air Conditioning Disconnect, Pullout, Non-Fused, 60 AMP, 2-Pole, SELF TEST,120/240 VAC, Metallic, Galvanized Steel Enclosure, NEMA 3R, Includes 15 Amp Type WRTR GFCI Receptacle.
What are the standard disconnect sizes?
The most commonly seen disconnects come in staged amperage sizes of 30, 60, 100, 200 and 400 amps. There also are 600-, 800- and 1,200-amp sizes, but these are very large and are usually found on the power one-line diagram. Each step up in size carries a large increase in both material and labor costs.
What size fuses for 30 amp AC disconnect?
2 fuses
The GE 30 Amp 120/240 Volt 240 Watt Fused (requires 2 fuses installed on the back side of the puller). AC disconnect has a NEMA 3R rated steel enclosure that is both rust and corrosion resistant for outdoor use.
How far off the ground does a disconnect have to be?
Minimum mounting height is not mandated by the NEC. When in its highest position, the center of the operating handle of the switch or circuit breaker should not be more than 6 ft 7 in.
Do they make a 40 amp disconnect?
The top-selling product within Disconnects is the Midwest Electric Products 40 Amp 240-Volt Fused Evaporative Cooler Disconnect.
How do you size a disconnect?
A properly sized disconnect switch for a single motor will:
- Have an ampere rating greater than or equal to 115 percent of the rated motor full load current; or,
- Have a HP rating greater than or equal to the rated motor HP (at applied voltage) if the disconnect switch under consideration is HP rated.
When sizing disconnect switches the current or voltage rating should?
When you install a disconnect switch for a single-motor application, it must meet the following two criteria: Have an ampere rating at least 115% of the rated motor full load current. Have a horsepower rating the same or greater as the rated motor horsepower (at applied voltage)
What size fuses for 60 amp disconnect?
You will find that a 60amp disconnect uses the large fuses that are only available in 40amp and above, although you can use the smaller fuses with a reducer. 30 amp disconnects are not uncommon and should be available any big box store.
Can a breaker be used as a disconnect?
Yes it can. Electric water heaters and dishwasher use the breaker as a service disconnect often. A permanently installed breaker lock enabling the technician to install a lock on a open breaker is required.
Does an air conditioner need a disconnect?
Disconnects are not used for regular control of the circuit, but are employed as a safety precaution. The disconnect must be within sight from the AC unit to prevent someone who doesn’t know the technician is working on the unit from turning the power on causing unit damage or human life concerns.
Is a disconnect required for air conditioner?
It also has to be readily accessible from the equipment. So the disconnect means must be within sight and readily accessible from the air conditioning equipment. It can be in or on the equipment.
