electrical
I have one 3 gang box of 44ci , and it needs to house the following wires:
Is this box deep enough and pass the inspection with above wires?
If not what is the alternative solution, a junction box which will reduce jumper wire from 3 gang box?
Please advise.
Ideal Industries makes a few different varieties of twist-on wire connectors that can handle 6 conductors. After looking through the UL Listed Combinations (PDF) document, I was able to find 4 such connectors.
If you find yourself needing to connect more than 6 conductors, it's probably time to start looking for something other than a twist-on wire connector. As @Aaron pointed out, you can use a Push-In type connector for up to 8 conductors. You might also want to consider using a Crimp Connector, which can connect 4 to 10 #14 solid conductors (an insulated cover would be required when joining current carrying conductors).
Moving beyond crimp connections, you'll likely have to start looking at terminal blocks, bus bars, design changes, or alternative solutions.
All conductor combinations will vary from manufacturer to manufacturer, check the manufacturers documentation before using any electrical connector
Another option, is to use unused terminals on devices as splice points. For example, you might have a switch with both side and back terminals. Using the back terminal as a splice point, is an acceptable way to extend the circuit. In fact, some industrial grade receptacles (like the Leviton 5252 Series) offer 8 clamp style terminals on the back of the device.
Where multiple devices share a single hot wire, you can reduce the number of wires in a twist-on type connector by using a single extra long pigtail. You'll use the extra long pigtail to connect all the devices, eliminating the need for a single pigtail per device. So you can take the number of required pigtails from 3, down to 1. If you leave the feed hot extra long when originally wiring the circuit, you may be able to eliminate pigtails altogether. To do this:
Once you have all the devices connected in this manner, you can use the end of the wire to feed through to other devices. Simply remove a bit of insulation at the end of the wire, and use a twist-on wire connector to connect this wire to the wires feeding the other devices.
As for connecting bundles of wires with pigtails. There's no problem doing this, as long as you don't exceed individual connector conductor fill, or overcrowd the box.
Looks like the left switch is grounded, the middle switch is not grounded but should be and the right switch may be grounded (can't tell from the pictures). Since the box is plastic, there is no way that they are all grounded. Run a wire to pigtail the middle switch (and possibly right switch) to the ground wire.
Best Answer
There was a change to the 2020 box fill calculation but you only have 4 grounds so your totals will be the same. 14 gauge is a 2cu inch multiplier.
So you have 9 current carrying conductors
4 grounds= 1
Each switch is a 2x so 6 (a total of 12 cu in)
16 x2 = 32 cu inch if there are clamps add 2 = 34cu in
so you should be fine You have a 10 cu inch safety.
Added with the addition of the feed wire: With the addition of the feed wire 14-2 this adds 4.5 to the total for 38.5 cu inch See comments for the complete calculations. The box fill has changed and this change for 2020 increased the calculated fill by +.5 cu inch.