The problem with using electrical tape is that it does not breath so the moisture in the sinew and hide glue can only go into the wood. This will cause it to take longer to cure. I use old bed sheets ripped into 2" wide strips to wrap, others use ace bandages, both of which will breath and allow some of the moisture to evaporate.
I would be afraid that the electrical tape would allow bacteria or rot to set into the sinew and hide glue before it had a chance to completely dry.