When required by the Board to do so the consumer shall deposit security amount which shall be approximately equivalent to 3/4/6/8 months estimated bills in the consumer's premises in respect of month ly/b i- monthly/ quarterly/half yearly billed consumers respectively and in no case be less than Rs. 30/- or Rs. 40/- or Rs. 60/- per 0.5 KW connected load for the lighting installation in respect of monthly/bi-monthly/quarterly billed consumers respectively and Rs. 75/- or Rs, 100 or Rs. 150 per HIP connected load for motive power installation in respect of monthly/bi-monthly/ six monthly billed consumers respectively. The I-T Industrial consumers shall deposit security deposit equivalent to two months bill. The Board further directs that on this basis the SD should be recovered from the existing consumers. However, in case if there is excess SD (i. e. more than 2 months bill) no refund should be given.