[eddy current]

The wording isn't very clear...as usual.
I take it to mean that, for example, each switch counts as two wires
unless it's one of those oddball things with 2 switches on one strap.
P&L

I read it as any device attached to one strap = 2 wires. including multiple switches on ONE strap.

 

[eddy current]

EDIT: Sorry - title should have read (2) (c)
I was rereading this rule tonight - I had up to this point taken it to mean that for each flush device box fill was reduced by two conductors. However, on rereading I thought there seems to be some ambiguity in the wording - the way the code reads seems as if you could, say, in a three gang box, count three devices as only totalling two conductors worth of fill - in sum, not for each.

To put it another way, the way it's worded seems to indicate that it's the presence of devices that counts, not the number.

Here's the code:

12-3034 Maximum number of conductors in a box
(2) Except as specified in Subrule (3) and subject to the details given in Subrule (1), boxes of the nominal dimensions given in Table 23 shall not contain more insulated conductors of a given size than permitted by the Table, and the number of conductors shall be reduced for each of the following conditions as applicable:
(a) one conductor if the box contains one or more fixture studs or hickeys;(b) one conductor for every pair of wire connectors with insulating caps (no deduction for one wire connector, deduct one conductor for 2- or 3-wire connectors, two conductors for 4- or 5-wire connectors, etc.);
(c) two conductors if the box contains one or more flush devices mounted on a single strap.

Any thoughts?

Pretty clear to me. Table 23 doesn't have dimensions for gangable boxes? They are talking about one box at a time.

Same as if we gang two boxes, the fill is now double. but not indicated on table 23.

 

[eddy current]

Here is one device on one strap (each one counts as 2 wires)

Here is two devices on one strap(also counts as 2 wires)

Basically we count 2 wires for every one of these metal straps, regardless of how many devices are attached to it.

edit: unless it is deeper than 2.54 cm of course

 

[eddy current]

I agree that makes more sense but the wording doesn't communicate that.

Sure it does?
" Code handbook says 2 conductors for any one or more devices on a strap"

OR


2 conductors for every metal strap that holds devices, better?



What do you think they mean by "a strap?"