I print all PETG, PLA, ABS, TPU... all inside enclosure, just select different parameters for different materials (like usual!). All prints Extremely well and with no material there is an issue. Note that ABS doesn't require A LOT of temperature, just a rapid cooling and air-mixing is a problem. 35°C is great for ABS and it's no way too hot for electronics.
Power supply already have FUSE inside. I suggest enclosure power inlet with FUSE which you can find in the BOM and the FUSE rating should be at least 3A if you have 120V main or at least 2A for 230V.