As always it depends on the individual, mle or female. If I were hiring anyone and they brought up their concerns about spiders, I would comment that if the area were to have poisoness spiders we would of course have a pest control company take care of the problem before we begin work. But for the most part common house spiders are not a safety issue and are just as afraid of us as we are of them. Being afraid is a good thing, and learning to overcome your fear by developing an educated respect for dangerous conditions is one of the things that make you a professional. If your fears become irrational then they can take control of your thought process and the ability to reason effectively and that can become a danger to you or those around you. In the electrical buisness there are many other dangers that are not as obvious as spiders. Unless you are willing to work to understand the hazards involved in the occupation and how to avoid them then you should consider carfully before you accept employment in the electrical field.
Male or female I would not discriminate, some people are better at tasks and some are better at others...I have worked with women that could run rigid as well as the best men