TRANSFORMER METERAGE CHARTS
(a) Neon Gas
Sec. Voltage	Tube Diameter
	9mm	10mm	12mm	15mm	18mm	20mm	25mm
2000V	1.2	1.5	1.5	2.1	-	-	-
3000V	2.3	2.8	3.3	4.0	4.7	5.2	6.3
4000V	3.1	3.7	4.4	5.3	6.3	6.9	8.4
5000V	3.8	4.6	5.5	6.6	7.8	8.6	10.4
6000V	4.6	5.6	6.5	8.0	9.4	10.3	12.5
7000V	5.3	6.5	7.6	9.3	10.9	12.0	14.6
8000V	6.1	7.4	8.7	10.6	12.5	13.7	16.7
9000V	6.8	8.3	9.8	11.9	14.1	15.4	18.8
10000V	7.6	9.2	10.9	13.2	15.6	17.1	20.8
12000V	8.9	10.4	12.1	15.4	17.2	19.8	24.7
15000V	10.8	11.9	14.4	18.7	21.1	22.5	31.3
(b) Mixed Gas (Argon + Mercury)
Sec. Voltage	Tube Diameter
	9mm	10mm	12mm	15mm	18mm	20mm	25mm
2000	2.7	3.1	3.3	3.7	4.0	4.3	4.8
2500	3.4	3.8	4.2	4.7	5.0	5.4	6.0
3000	4.1	4.6	5.0	5.6	6.0	6.4	7.2
4000	5.4	6.1	6.6	7.4	8.0	8.6	9.6
5000	6.8	7.6	8.3	9.3	10.0	10.7	11.9
6000	8.1	9.1	9.9	11.1	12.0	12.8	14.3
7000	9.5	10.6	11.6	12.9	14.0	14.9	16.7
8000	10.8	12.1	13.2	14.8	16.0	17.1	19.1
9000	12.2	13.6	14.9	16.6	18.0	19.2	21.5
10000	13.5	15.1	16.5	18.5	20.0	21.3	23.8
12000V	15.7	16.9	18.4	21.1	23.0	24.1	29.9
15000V	17.9	20.2	21.8	24.9	26.0	28.4	37.5
Electrical metre = linear metre PLUS half a metre per PAIR of electrodes.  Example... 4 tubes each 1 metre long = 4 metres.  4 pairs of electrodes = 2 metres.  Total electrical metres = 6    Notes All secondary current values should be checked after installation using a mili ampmeter. This is to ensure proper loading on the transformer.  Sharp bends of tubes could also decrease driving distance.   THESE CHARTS MUST BE USED AS A GUIDE ONLY