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davesparks
but what if its the ceiling that you are trying to wire, not just the 3 core pvc cables, even fibre wire might sometime goes through the ceiling, ive done a reseach on the ways to dispence cable and this is the picture ive found View attachment 31478and besides there might be some amateurs that want to only use a fixed amount of cables, for uses like study purposes, simplifying procress of finding the best and neat route for future renovations and even like using midi cable to route from the hall to the canteen and wanted to prevent overrunning of wires if the product is tripped by a person
Installing fibre optics is a bit more specialist than installing mains cables!
Amateurs should not be carrying out electrical work full stop, electricity kills within a fraction of a second.
Why would you ant to install long midi cables? Normally midi interconnects would only be short distances between pieces of equipment?