People for some reason wish to trivialize the importance of electrical safety. The ambiguities as noted by Pianotuna are all too frequent.
Any claim that UL is derelict is going to face 9 regiments of courtroom battle hardened attorneys. I simply do NOT trust UL as an all encompassing guarantee of safety anymore. The certificate is a basic better than nothing start but I am reminded of the FAA and the forbidding of soldering because of risk of PMA license revocation. The FAA and countless drones mimic the words. SOLDER! VIBRATION! FAILURE!
I respond with SOLDER! ALTERNATOR! STARTER MOTOR! ELECTRONICS! After which I hear dead silence. The reason is skewed. Soldering is prohibited because few mechanics know or want to learn the technique of soldering. I was called on the carpet decades ago for soldering an electrical harness running between the alternator, voltage regulator and Over Voltage Limiter on a Lycoming engine. Another PMA mechanic freaked when he saw (SHRIEK!) heat shrink tubing. I got off on a technicality that exempted charging system harness interconnections.
God forbid anyone challenging bureaucratic rote.
