Red Spot Fuse Link Selection

Select a rating of fuse link which is at least equal to the normal full load current of the circuit, including any allowances needed for harmonic currents, as in the case p.f. correction circuits.
Ensure that the fuse link rating can withstand any over currents which may apply to the circuit, such as transformer in-rush currents, motor starting surges and repetitive cycle loads.
When full cable protection is required, ensure that the fuse link rating is compatible with the selected cable, i.e. less than or equal to cable rating.

Fuseholder rating	'RED SPOT' HRF fuse link to BS88:Part 2: 1988 660 Volt a.c.	Extended Range of 'RED SPOT' HRC fuse links to BS 88: Part 2: 1988 for motor circuit protection
Amp	TYPE:	TYPE:	Current rating Amp	Rating for motor starting Amp
20	NIT2-20A	NIT20M251 NIT20M321	20 20	25 32

32	TIA2-32A	TIA32M35 TIA32M40 TIA32M50 TIA32M63	32 32 32 32	35 40 50 63

63	TIA2-32A TIS35-63A	TIS63M80 TIS63M100	63 63	80 100

100	TIA2-32A TIS35-63A TCP63-100A	TCP100M125 TCP100M160 TCP100M200	100 100 100	125 160 200

200	TBC2-3A TC80 & 100A TF125-200A	TF200M250 TF200M315	200 200	250 315

400	TKM250 & 350A TM355 & 400A	TM400M450	400	450

Recommended minimum torque values

Rating	Fuse Link fixing screw		Cable terminal screw		Back connected stud

	Size	Torque	Size	Torque	Size	Torque

RS20	4BA (Ø35mm)	1,2Nm	1/4” BSF grub screw	2,0Nm	M6	3,0Nm
	Pan head	(11 lb.in)	(Slotted)	(18 lb.in)		(27 lb.in)

RS32	2BA (Ø45mm)	2,0Nm	1/4” BSF grub screw	2,0Nm	M6	3,0Nm
	Pan head	(18 lb.in)	(Slotted)	(18 lb.in)		(27 lb.in)

RS63	2BA (Ø45mm)	2,0Nm	3/8” BSF grub screw	3,5Nm	M8	6,0Nm
	Pan head	(18 lb.in)	(Slotted)	(31 lb.in)		(53 lb.in)

RS100	M6	2,5Nm	1/2” BSF grub screw	4,0Nm	M10	10,0Nm
	Pan head	(22 lb.in)	(Slotted)	(35 lb.in)		(89 lb.in)

RS200	M6	2,5Nm	5/8” BSF hex head	25,0Nm	M12	14,0Nm
	Pan head	(22 lb.in)	(18mm A/F)	(18,5 lb.ft)		(10 lb.ft)

RS400	M8	6,0Nm	5/8” BSF hex head	25,0Nm	M16	25,0Nm
	Hex head	(53 lb.in)	(18mm A/F)	(18,5 lb.ft)		(18,5 lb.ft)

Note:	Conversion from Nm to lb.in.	1Nm = 8,85075 lb.in.

(From Red Spot catalogue.)

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