Is it possible to prevent banana plugs from conducting if\/when they touch by wrapping the metal housing in shrink tube or electrical tape? Banana plugs that touched in a close terminal setup blew a few fuses in my amps. Luckily that seems to have been the only damage, but it could have been worse I'm sure. Why aren't banana plugs sold with a protective outer layer like all other cable have (RCA)? But most important is will that e-tape solution work so if they're in close proximity I can set my mind at ease?