FT-4 - CSA designation for vertical tray flame test.
FT-6 - CSA designation for plenum or MI flame test.
FUSED SPIRALTAPE - This refers to a type of PTFE insulated hook-up wire.The conductor is run through a taping head so that each successive wrap overlays the previous wrap. The spiral wrapped conductor is then passed through a sintering oven where the overlaps are fused together. The wire is then sized and polished.
FUSIONSPLICE - A splice accomplished by the application of localized heat sufficient to fuse or melt the ends of two lengths of optical fiber. Same as heat shrink splice.
