Ubwoko bwa 4P bwo guhererekanya amashanyarazi Q3R-63/4 nigikoresho gikoreshwa muguhuza no guhindura amasoko abiri yigenga (urugero, AC na DC) kurindi soko ryingufu. Mubisanzwe bigizwe nabantu bane bigenga, buri kimwe kijyanye nimbaraga zinjiza.
1. Ubushobozi bukomeye bwo guhindura imbaraga
2. Kwizerwa cyane
3. Igishushanyo mbonera cyimikorere myinshi
4. Kugaragara byoroshye kandi bitanga
5. Urwego runini rwo gusaba