I agree, fire risk should be taken seriously and one should tap the power way below its maximum rated, i learnt thrlere is something called continuois duty cycle rated about 70% below the max rated output for around the clock operation, not sure what other consoderation should be taken to make it safe, i am also keen on getting to know the ordinance in regards to what precautions to take even though ot does not apply to my area.
80% continuous load is code, but 70 or lower would definitely be safer unless you know what you're doing (and know for sure your wiring is modern and can handle the load). Also keeping in mind that continuous load is defined as 3+ hours operation time, which means that if, for example, your tv, stereo, and PS4 are on the same circuit, you may end up having problems if you, say, watch Lord of the Rings.