Dexteritiy takes a back seat to safety when talking gloves...a person who uses gloves with some regularity will "adjust" to working with them on.
When I say "gloves", I mean rubbers AND leathers. The leathers are there to protect the rubbers which protect the user. The rubbers should be tested every 6 months (it may be 3 months, I forget as I haven't been "regular" in many years ~ and no, I'm not "irregular" you wise guys! ) by a qualified testing company.
I am partial to White gloves ( http://www.whitesafetyline.com/index.html
This style glove is what I typically use on a service tie-in:
Mine is a 12" style.
EDIT: Mine are rated at 5kv, and I have used them at times on voltages upto 4160v.
For working in a panel, I assume everything is "hot" and proceed with extreme caution...I'm not sure I could even feel a #10 with those gloves on.
With gloves, care and maintainance is CRITICAL. Poor care and maintance can be expensive and dangerous - assuming a damaged glove is "ok" is asking for an accident. You must train the persons using the gloves proper care and maintance.
EDIT #1: Included rated
EDIT #2: White Gloves are located in Ravenna, Ohio
[This message has been edited by Celtic (edited 02-12-2006).]