All terminal boxes shall be made of cast iron, or steel plate. The cover shall have neoprene joints and shall be screwed to the box.The locked rotor current values at rated voltage and frequency, shall be less than 660% of rated current for motors rated up to 1000 kW and less than 550% for motors of more than 1000 kW. These are maximum values of current, in these values are already included the tolerances.All terminal boxes shall be made of cast iron, or steel plate. The cover shall have neoprene joints and shall be screwed to the box.All terminal boxes shall be made of cast iron, or steel plate. The cover shall have neoprene joints and shall be screwed to the box.