spider boxes are not a bad thing, they have their places. I personally just use
pass through's. But if you have a bunch of racks that dont, then thats when the
spider box comes in. It looks better than having a bunch of cam T's shoved on the back of racks. As far as
circuit protection, most pass throughs are not protected by the
breaker in the rack. You dont want to have an internal short in a rack take out the rest of your rig, you just want it to protect that rack. All pass throughs are rated for at least 400 amps. (since 400 amps is the max amperage for the cam connectors, when you excede this, then you get into the fun task of having double hots,
neutral and
ground). You commonly see spider boxes in the video industry because many of the bigger lights have cam on the end of them so you have to use a
spider box as a big 4-fer or whatever. Also knowlege of amperage is definately neccessary when useing
feeder. Since most disconnects are rated between 200-600 amps, if you go plugging your 2
awg feeder into a 600 amp
disconnect and then try running 400 amps down it. Nothing is going to protect your
feeder, until you have a big goo ball. Even after i clamp around all the legs checking for amperage draw, i go back later and do the
hand test, to make sure its not getting too warm for some reason.
) Each had 5 male and 5 female cams. 
