Load supporting electrical box system suited for installation in concrete and having enlarged cavity therein

A mounting assembly suited for installation in a concrete ceiling, comprising:

• a) a junction box having a top and an open bottom;
• b) said junction box having a side wall defining a junction box cavity therein;
• c) a detachable lid disposed on said top of said junction box;
• d) a seal disposed between said top of said junction box and said lid, said seal preventing the introduction of liquid into said junction box cavity;
• e) a fastener attachment site disposed within said junction box, said fastener attachment site being sized for attaching a first size of fixture fastener;
• and
• f) a fixture fastener attached to said fastener attachment site;
• and
• g) said fixture fastener being disposed for being extendable below said open bottom of said junction box.

A mounting assembly suited for installation in a concrete ceiling, comprising:

• a) a junction box having a top and an open bottom;
• b) said junction box having a side wall defining a junction box cavity therein;
• c) a detachable lid disposed on said top of said junction box;
• d) a seal disposed between said top of said junction box and said lid, said seal preventing the introduction of liquid into said junction box cavity;
• and
• e) a fastener attachment site disposed within said junction box, said fastener attachment site being sized for attaching a first size of fixture fastener.

A mounting assembly suited for installation in a concrete ceiling, comprising:

• a) a junction box having a top and an open bottom;
• b) said junction box having a side wall defining a junction box cavity therein;
• c) a detachable lid disposed on said top of said junction box;
• d) a fastener attachment site disposed within said junction box, said fastener attachment site being sized for attaching a first size of fixture fastener;
• and
• e) a fixture fastener attached to said fastener attachment site;
• and
• f) said fixture fastener being disposed for being extendable below said open bottom of said junction box.

A mounting assembly suited for installation in a concrete ceiling, comprising:

• a) a junction box having a top and an open bottom;
• b) said junction box having a side wall defining a junction box cavity therein;
• c) a detachable lid disposed on said top of said junction box;
• d) a seal disposed between said top of said junction box and said lid, said seal preventing the introduction of liquid into said junction box cavity;
• e) a fastener attachment site disposed on said junction box, said fastener attachment site being sized for receiving a first size of fastener;
• f) a further fastener attachment site disposed on said junction box, said further attachment site being sized for receiving a second size of fastener differing from the first size of fastener;
• and
• g) said further fastener attachment site being spaced apart from said fastener attachment site.

A mounting assembly suited for installation in a concrete ceiling, comprising:

• a) a junction box having a top and an open bottom;
• b) said junction box having a side wall defining a junction box cavity therein;
• c) a detachable lid disposed on said top of said junction box;
• d) a seal disposed between said top of said junction box and said lid, said seal preventing the introduction of liquid into said junction box cavity;
• e) a fastener attachment site disposed on said junction box;
• f) said lid extending outwardly of said side wall;
• and
• g) said lid extending sufficiently outwardly of said side wall for preventing said lid and said junction box attached thereto from being pulled out of concrete in which it is installed by forces acting downwardly on said junction box during use.