Toilets are usually provided; if none are available, it seems rather inappropriate for the control room staff to go outside to use the toilet. As for the water issue, the control room has an anti-static floor and is located at a high level; toilets are equipped with threshold stones, so this should prevent water from leaking out, right? The specifications for the design of the control room in HGT20508 mention bathrooms among the auxiliary rooms: 3.3 Layout and Area 3.3.1 The control room should be equipped with functional rooms and auxiliary rooms based on factors such as the management style, the scale of the control system, and functional requirements. The functional rooms and auxiliary rooms in the control room should be arranged in accordance with the following principles: 1 Functional rooms should include an operation room, cabinet room, engineer’s room, air conditioning room, uninterruptible power supply (UPS) room, spare parts room, etc ; 2 Auxiliary rooms should include shift change rooms, meeting rooms, dressing rooms, offices, document rooms, rest areas, toilets, etc. 3.3.2 The functional rooms and auxiliary rooms in the central control room should be arranged in accordance with the following principles: 1 Functional rooms should include the operation room, cabinet room, engineer’s room, air conditioning room, UPS room, telecommunications equipment room, printer room, network server room, spare parts room, security and fire monitoring room, etc ; 2 Auxiliary rooms should include shift change rooms, production control rooms, meeting rooms, dressing rooms, offices, document rooms, rest areas, training rooms, first-aid equipment rooms, toilets, etc.