Electric load center

Patent metadata

Field	Value
Publication number	US-9859692-B1
Application number	US-201715402337-A
Country	US
Kind code	B1
Filing date	Jan 10, 2017
Priority date	Jan 10, 2017
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

An electrical load center for residential and commercial buildings includes an enclosure, a cover assembly, and a panelboard. The panelboard includes an insulated base, first and second bus bars, each of the first and second bus bars having an elongated main member, a plurality of connecting members, each of which is integrally formed from an edge of the main member, and a plurality of conducting members integrally formed from each of the connecting members. The panelboard further includes at least one neutral bar. The neutral bar is preferably I-shaped and includes a generally vertical main body, and transverse upper and lower members. The transverse upper member is preferably thicker than the transverse lower member and includes an outward taper from a top surface to a bottom of the transverse upper member to provide a greater contact surface area.

First claim

What is claimed is:

1. An electric load center comprising:
an enclosure having an open front;
a cover assembly configured to be installed over the open front of the enclosure; and
a panelboard adapted to be installed within the enclosure, the panelboard including:
an insulated base having front and rear surfaces;
first and second bus bars, each of the first and second bus bars having an elongated main member extending between top and bottom opposing ends, a plurality of connecting members, each of which is integrally formed from an edge of the main member, and a plurality of conducting members integrally formed from a bottom edge of each of the connecting members; and
at least one neutral bar, the at least one neutral bar having a generally vertical main body having first and second ends, and transverse upper and lower members integrally connected and separated by the main body, wherein the transverse upper member is thicker than the transverse lower member, and wherein the transverse upper member includes an outward taper from a top surface of the transverse upper member to a bottom surface of the transverse upper member.

2. The electric load center of claim 1 , wherein the conducting member of each of the first and second bus bars is integrally connected to a corresponding main member of the bus bar via a connecting portion, wherein the connecting portion is deformed and stretched where the conducting members are formed by bending.

3. The electric load center of claim 1 , the panelboard further includes first and second lugs, wherein the first and second lugs are mechanically and electrically connected to the first and second bus bars, respectively.

4. The electric load center of claim 3 , the panelboard further includes a lug stabilizer, wherein the lug stabilizer includes a base and grooves thereon to closely accommodate the first and second lugs therewithin to stabilize and prevent rotation of the lugs.

5. The electric load center of claim 4 , wherein a lug stabilizer mounting hole is provided on the base of the lug stabilizer, the mounting hole being adapted to receive a fastener, to secure the lug stabilizer to the enclosure.

6. The electric load center of claim 5 , wherein the panelboard is configured to be installed in a vertical orientation within the enclosure.

7. The electric load center of claim 1 , wherein the at least one neutral bar includes a plurality of neutral bar apertures and corresponding neutral bar connecting screws along the entire length of the at least one neutral bar.

8. The electric load center of claim 1 , wherein the at least one neutral bar is substantially I-shaped.

9. The electric load center of claim 1 , wherein the outward taper at the transverse upper member angle is approximately a 4 degree angle relative to a y-axis.

10. The electric load center of claim 1 , wherein a circuit breaker is mechanically plugged onto or pulled off from each of the first and second bus bars and the at least one neutral bar by movement in one linear axial direction substantially perpendicular to the base of the panelboard.

11. The electric load center of claim 1 , wherein each conducting member of each of the first and second bus bars is substantially perpendicular to each corresponding connecting member.

12. The electric load center of claim 1 , wherein a plurality of bus bar mounting openings are provided on each of the first and second bus bars.

13. The electric load center of claim 12 , wherein the base of the panelboard includes a plurality of base studs, which align with the plurality of bus bar mounting openings such that the first and second bus bars are adapted to be seated and abutted directly on the front surface of the base of the panelboard.

14. The electric load center of claim 1 , wherein the connecting member of the bus bar is formed as a continuous wedge-shaped member.

15. The electric load center of claim 1 , wherein the enclosure includes:
opposed top and bottom walls;
opposed first and second side walls; and
a back wall extending between the opposed top and bottom walls, and extending between the opposed first and second side walls;
wherein the walls of the enclosure cooperatively define an enclosure volume for holding various interior components.

16. The electric load center of claim 15 , wherein a plurality of knockouts are stamped onto each of the walls of the enclosure to provide knockout openings thereon to allow routing of electrical wires to and from the enclosure.

17. The electric load center of claim 15 , wherein the enclosure further includes a plurality of inturned members, which are integrally formed from the top, bottom, and side walls of the enclosure and disposed on top thereof.

18. The electric load center of claim 1 , wherein the cover assembly includes:
a trim panel having a door aperture;
a recessed portion coupled to the trim panel; and
a door having a latch mounted thereon, the door hingedly connected to the trim panel.

19. The electric load center of claim 18 , wherein the latch includes:
a handle having a handle top member, a handle body member, and a latch connector,
a lock having a hook and a lock body member; and
a spring having a tongue and a spring body member;
wherein the lock body member and the spring body member define a lock aperture and a spring aperture, respectively, through which the latch connector can be inserted to mount the lock, the spring, and the handle to the door.

20. The electric load center of claim 19 , wherein the latch handle, spring, and lock are formed as separate components.

Assignees

• Abb Schweiz Ag

Inventors

• Lalancette Daniel
• Pelletier Jean-Michel
• Lefort Maxime

Classifications

• H02B1/056

  Mounting on plugboards · CPC title

• H02B1/44 Primary

  Hinged covers or doors · CPC title

• H02B1/20

  Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards (installations of bus-bars H02G5/00) · CPC title

• H02B1/06

  having associated enclosures, e.g. for preventing access to live parts · CPC title

• H02B1/24

  Circuit arrangements for boards or switchyards · CPC title