
I made a relay tester out of this. These are small plastic boxes that are not waterproof, but you can make them waterproof. They now come in individual pouches within a larger zipped pouch. I don't care about the latch on the lid, I would prefer screws but it will work.

Waterproof ABS Electrical Junction Box Enclosure With IP65 Rating - Black 7.87 X 4.72 X 2.95 Inch (200 X 120 X 75Mm) By Zulkit
12 Review

β‘οΈ RVGUARD 50 Amp Weatherproof Outdoor Electrical Power Outlet Box - Lockable RV/EV NEMA 14-50R Receptacle Panel, 125/250V, ETL Listed
9 Review

Zulkit Junction Box ABS Plastic Waterproof IP65 Electrical Boxes Hinged Shell Outdoor Universal Project Enclosure With Mounting Plate And Wall Brackets Grey 11.8X7.9X6.3 Inch(300X200X160Mm)
10 Review

Inkbirdplus Dustproof Waterproof Electrical Enclosure
9 Review

π‘ High-Quality Advance ICN-4P32-SC Electronic Fluorescent Ballast: Ideal for 4 Lamps, 32W T8, 120/277V
3 Review

Fulham WorkHorse WH2-120-C Adaptable Ballast - 2 Pack
3 Review

Robertson Worldwide ISL432T8HEMV AH 3P20160 120-277V 50-60Hz High Power Factor 4 F32T8 Linear Lamp Fluorescent eBallast
6 Review

Wireless Electronic Ballast Interface Certified
8 Review