Secondary distribution box illegally connected to power strip
However, interconnecting these devices is a violation of Occupational Safety and Health Administration (OSHA) regulations and the National Electrical Code because doing so can cause them to become overloaded, leading to their failure and a possible fire. Power strips are actually called "relocatable power taps" in the UL book, and are referenced by the UL product category code XBYS. TL;DR: Daisy chaining power strips—plugging one strip into another, or into an extension cord—violates OSHA 29 CFR 1910. An illegal connection involves hooking up a home or business to the power grid without authorisation. To meet power supply needs, extension cords or surge protected power strips are often interconnected, or "daisy chained," to readily provide more outlets and/or to reach greater distances. This act introduces a significant safety risk by potentially overloading the original circuit, which can lead to overheating and serious hazards.
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