Voltage rated gloves must be used when performing work on exposed energized conductors greater than 50V but do you have to wear leather protectors?
The answer is made clear by OSHA 1910.137(c)(2)(vii)
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.137
1910.137(c)(2)(vii)
1910.137(c)(2)(vii)(A)
Protector gloves need not be used with Class 0 gloves, under limited-use conditions, when small equipment and parts manipulation necessitate unusually high finger dexterity.
Note to paragraph (c)(2)(vii)(A): Persons inspecting rubber insulating gloves used under these conditions need to take extra care in visually examining them. Employees using rubber insulating gloves under these conditions need to take extra care to avoid handling sharp objects.
1910.137(c)(2)(vii)(B)
If the voltage does not exceed 250 volts, ac, or 375 volts, dc, protector gloves need not be used with Class 00 gloves, under limited-use conditions, when small equipment and parts manipulation necessitate unusually high finger dexterity.
Note to paragraph (c)(2)(vii)(B): Persons inspecting rubber insulating gloves used under these conditions need to take extra care in visually examining them. Employees using rubber insulating gloves under these conditions need to take extra care to avoid handling sharp objects.
1910.137(c)(2)(vii)(C)
1910.137(c)(2)(vii)(D)
Insulating gloves that have been used without protector gloves may not be reused until they have been tested under the provisions of paragraphs (c)(2)(viii) and (c)(2)(ix) of this section.
Not wearing protector gloves means your gloves are good for single-use, then they must be sent off for testing. When do you have to wear voltage rated gloves? Find out by following this link or by reading through the rest of 1910.137.
Which gloves are appropriate? Find out here: https://www.70econsultants.com/when-500v-gloves-are-not-good-enough-for-480v-work/