Abstract: A service entrance includes a post section, a service section, and a neutral bus disposed therebetween. The post section includes a first opening and a second opening, and is adapted to receive an electrical supply wire having a supply power wire and a supply neutral wire. The service section is disposed at the post section, and includes a third opening and a fourth opening, wherein the third opening is juxtaposed the first opening and the fourth opening is juxtaposed the second opening. The neutral bus, having a first end at the post section and a second end at the service section, is disposed passing through the second and fourth openings. The first end of the neutral bus is adapted to electrically connect with the supply neutral wire.