3. Code, Description and Usage

Code	Description	Usage
BXF, BLXF	Copper conductor rubber insulation and PCP or other equivalent synthetic elastomer sheath power cable Aluminum conductor rubber insulation and PCP or other equivalent synthetic elastomer sheath power cable	Suitable for indoor and out door power lines, especially in cold area
BX, BLX	Copper conductor rubber insulation and cotton yarn or other equivalent fiber braided power cable Aluminum conductor rubber insulation and cotton yarn or other equivalent fiber braided power cable	Used for fixed installation, laid on or below the surface
BXR	Copper conductor rubber insulation and cotton yarn or other equivalent fiber braided flexible power cable	For indoor application where flexibility is required

4. Technical Particulars

Sectional Area (mm2)	Conductor Strands/Dia. (mm)		Max. Overall Dia. (mm)			Max. Conductor DC Resistance at 20℃ (Ω/km)
	B	R	BXF BLXF BXY BLXY	BX BLX	BXR	Copper	Aluminum
0.75	1/0.97	7/0.37	3.9	4.4	4.5	24.5
1.0	1/1.13	7/0.43	4.1	4.5	4.7	18.1
1.5	1/1.38	7/0.52	4.4	4.8	5.0	12.1
2.5	1/1.78	19/0.41	5.0	5.2	5.6	7.41	11.8
4	1/2.25	19/0.52	5.6	5.8	6.2	4.61	7.39
6	1/2.76	19/0.64	6.8	6.3	6.8	3.08	4.91
10	7/1.35	49/0.52	8.3	8.2	8.9	1.83	3.08
16	7/1.70	49/0.64	10.1	9.4	10.1	1.15	1.91
25	7/2.14	98/0.58	11.8	11.2	12.6	0.727	1.20
35	7/2.52	133/0.58	13.8	12.5	13.8	0.524	0.868
50	19/1.78	133/0.68	15.4	14.4	15.8	0.387	0.641
70	9/2.14	189/0.68	18.2	16.4	18.4	0.263	0.443
95	19/2.52	259/0.68	20.6	18.9	20.8	0.193	0.320
120	37/2.03	259/0.76	23.0	19.8	21.6	0.153	0.253
150	37/2.25	336/0.74	25.0	21.8	25.9	0.124	0.206
185	37/2.52	427/0.74	27.9	24.2	26.6	0.0991	0.164
240	61/2.25	427/0.85	31.4	27.4	30.2	0.0754	0.125

5. Technical Performance
1) The insulated cable core shall bear the sparking test specified in GB/T3048.9 or GB/3048.13. Sparking test is made only once to cables with sheath and insulation extruded at one time.
2) Sheath
a> The sheath of BXF, BLXF cable shall be 65℃ normal flame-retardant rubber of XH-01A type according to GB7594.5.
b> The sheath of BXY, BLXY cable shall be black low-density polythene.

c> The sheath shall be extruded tightly on the insulation and its surface shall be smooth with an even color.

3) The finished cable shall withstand the voltage test after immersion in water in the following table.

Test Conditions	Unit	Performance Index
Sample length	m	≥10
Time of immersion in the water	H	≥1
Water temperature	℃	20±5
Applied voltage	V	2000
Applied Time	min	≥5