Hendrix
Senior Member
- Location
- New England
Would one have to make a disconnect available insight, inside if there were only low voltage to the wall unit?
ductless split ac systems
- Thread starter Hendrix
- Start date
- Status
Buck Parrish
Senior Member
- Location
- NC & IN
No, the new ones have a different design, slow start, etc...
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
IMO, all motors need a disconnect switch in sight. However many authority having jurisdiction's will let it go.
Hendrix
Senior Member
- Location
- New England
So...........not wanting to supersede the code, should I insist on even a low volt disco?
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
IMO, a small dp snap switch should work fine. Some of these units have 3 wires- one is communication so you would not need to disconnect that one.
Hendrix
Senior Member
- Location
- New England
Thank you.
Buck Parrish
Senior Member
- Location
- NC & IN
I don't think a db switch is rated for that small of wire. They use thermostat wire. All of them that I've done the HVAC guys wire the inside part. We're doing two tomorrow.
wiringny
Member
- Location
- Belle Harbor, NY
it has been my experience that the voltage coming inside to the indoor unit is over 120v! The indoor wiring HVAC contractors are installing SJ cord is illegal per code based on the voltage. Here in NYC, we are currently being required, and it is code, to install a disconnect alongside the indoor fan unit. We are currently installing three wire MC cable from the outdoor unit to the inside unit with a disconnect.
IMO, it does not change the requirement for a disconnect in sight from the motor as dictated by 430.102, but there are units presently on the market that use 24v as well as DC motors in addition to ones that use 120v-240v motors.
shortcircuit2
Senior Member
- Location
- South of Bawstin
Why look to 430.102?
440.14 should guide the installer...
The manufacturers need to start putting disconnects as an integral part of these units.
440.14 should guide the installer...
The manufacturers need to start putting disconnects as an integral part of these units.
JDB3
Senior Member
- Location
- San Antonio, Texas
I have seen units that come with a 14/4 flex cord. Not sure what the insulation is on the cord.
Hendrix
Senior Member
- Location
- New England
pretty sure it's so cord which can't be run in the walls.
shortcircuit2
Senior Member
- Location
- South of Bawstin
shortcircuit2
Senior Member
- Location
- South of Bawstin
shortcircuit2
Senior Member
- Location
- South of Bawstin
Hendrix
Senior Member
- Location
- New England
This sounds pretty good. Now, if the unit makers would just include it in the package...........
Note under product description:
Tray Cable is a multi-conductor control, signal or power cable rated for 600 volts. May be installed in raceways, conduit, cable trays, and outdoor locations where supported by a messenger wire. Also suitable for direct burial. Temperature rating at 75?C wet locations / 90oC dry locations.
Kinds hides the fact that TC cable installed inside on other than industrial applications must be in a raceway (NEC 336.12)
When this product was introduced I discussed it with UL as the cur sheet I had did not identify nit as a type MC cable. UL cautioned that the product does require special connectors listed for the use.
It is slowly becoming a popular product for the mini-split installers in this area.
electrofelon
Senior Member
- Location
- Cherry Valley NY, Seattle, WA
IT does not appear to be a NEC chapter 3 wiring method then no......?
That was my concern, but it is actually a MC cable.
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
Maybe my link is faulty or my eyes are failing me, but the link to the "top secret product" shows UF wire not MC!
- Status