Is it LEGAL in California to use cheater plugs?

[flyboysmb]

I own an older building I rent out. The kitchen & bath have 3 wire outlets, but the living room & bedrooms have 2 wire outlets. My question is is LEGAL for renters to use 2 to 3 prong adapters (cheater plugs). If it is NOT LEGAL, what NEC/CEC code section specifically states this.

I understand the safety issues, my question is only regarding the legal use of these adapters.

Thanks,
Steve

 

[charlie b]

Duplicate. Closed.