Issue:
Product Design Features

Product Line:
QO and Homeline load centers

Resolution:
Main Lug Only = MLO
Main Breaker = MB

All the PK equipment ground bars are listed to accept up to (2) wires under each terminal screw for common circuit standard size wires(see FA126819 for wire sizes for all PK ground bars).
DOWN UNDER THE VISUAL IS A LIST OF STANDARD PK EQUIPMENT GROUND BAR CATALOG NUMBERS.

Based on the above, below is some general information for ALL PK ground bars being used in any QO or HOM load center.
1) ALL of the small space load centers will use the smaller PK equipment ground bars. The 2 space will use the PK3GTA1, the 2-4 space will use a PK4GTA and the 4-8, 6-12 or 8-16 space load centers will use a PK7GTA.

2) Most load centers will be marked on the labeling to state a Range of ground bar sizes that can be used, for example it might state this = "PK9--GTA Thru PK27GTA(L)   Equipment Ground Bar". This means that any ground bar from a
PK9GTA up to PK27GTA can be used, so like a PK12GTA, PK15GTA(L), PK18GTA(L), PK23GTA(L), etc. The Suffix (L) just means those ground bar kits will come with a Large Branch Neutral lug.
The range of ground bars that can be used will be stated on the load center wiring diagram. SEE BELOW A SAMPLE OF LABEL INFORMATION.

3) ALL convertible(MLO or MB) Double Row Construction load centers, have 3 mounting locations for ground bars, therefore multiple ground bars can be used in all of these load centers. The load centers will have a Equipment Ground
bar Symbol(see below) stamped into the load center enclosure, on the Left and Right side of the interior and at the bottom of the interior.


Below is the portion of wiring diagram on all the Convertible, Double Row Construction load centers, that show the load center Accessory kits and inside the Red out line is the PK ground bar information and the Equipment Ground bar symbol.


Here is a list of all the available Standard PK ground bars used for QO or Homeline load centers:
PK3GTA1, PK4GTA, PK5GTA, PK7GTA, PK9GTA, PK12GTA, PK15GTA(L), PK18GTA(L), PK23GTA(L), PK27GTA(L).
NOTE: the number inside the catalog number "3" or "12" or "18", is the number of terminals that particular ground bar will have.

Released for: Schneider Electric USA