B
Bobster
Well I was looking over some pictures on my camera, and came across these photos of a job where we needed to spike a cable. They were taken on site in my last job for my apprentices log book. Just thought it might interest some of the domestic lads on here who may never have seen it before.
The purpose of spiking a cable is the last test to prove its dead and safe to work on. This in particular cable is a 4core 75mm, and it was providing a supply for a DB which was made redundant as that part of the site was removed.
The spiking gun itself:
As you can see in the photo it pretty much is what it says on the tin, a gun that fires a spike through the armouring of a cable and then through one or more cores, this proves absolutely that the cable is dead, and if it isn't creates a large enough fault for circuit protection to work. As you can see we are packing the lower half of the gun with lead sheeting, this is because the cable is relatively small and the gun needs to be sat tight on the cable.
This is the gun tightened onto the cable, a 0.44 calibre firing cap is then inserted into the black tube. A length of string is attached to the firing pin, everyone is moved to a safe distance away and then bang. The string is pulled causing the spike to be shot through the cable, this being the aftermath:
I'll try and find some pictures of the firing cap mechanism and apologise for these being a bit rubbish (It was the apprentices fault honest lol)
Hope it proves to be informative for someone
Rob
The purpose of spiking a cable is the last test to prove its dead and safe to work on. This in particular cable is a 4core 75mm, and it was providing a supply for a DB which was made redundant as that part of the site was removed.
The spiking gun itself:
As you can see in the photo it pretty much is what it says on the tin, a gun that fires a spike through the armouring of a cable and then through one or more cores, this proves absolutely that the cable is dead, and if it isn't creates a large enough fault for circuit protection to work. As you can see we are packing the lower half of the gun with lead sheeting, this is because the cable is relatively small and the gun needs to be sat tight on the cable.
This is the gun tightened onto the cable, a 0.44 calibre firing cap is then inserted into the black tube. A length of string is attached to the firing pin, everyone is moved to a safe distance away and then bang. The string is pulled causing the spike to be shot through the cable, this being the aftermath:
I'll try and find some pictures of the firing cap mechanism and apologise for these being a bit rubbish (It was the apprentices fault honest lol)
Hope it proves to be informative for someone
Rob
