one such system proposed by the EMerge Alliance. There is no doubt that similar DC primary power
connection standards will develop for L5 and higher as these efforts mature.
16
Fig.25 EMerge Alliance compliant DC power system
The last level to be discussed in this paper is Level L6. It is best characterized as the power
distribution that takes place in the walls of a building. In almost all instances, this level is transparent
to most end users but serves a vital role in distributing and providing power to the lighting fixtures.
One such example of an L6 connection can be seen by simply removing the wall plate to an electrical
outlet— the building wiring is either poked-in or screw terminated to the receptacle assembly. With
ceiling or recessed lighting fixtures in North America, the L6 connection takes place in a junction box
in the fixture. This box contains a screw terminal block or pigtailed wires from the fixture that are
terminated to the building wiring with wire nuts or free-hanging poke-in terminations.
L5
Fig. 26 AC receptacle screw wire termination
L6
