New Zealand Gazette – 1927 – No. 48

Page 2421

✨ Electrical Wiring Regulations Tables

[JULY 12.]

THE NEW ZEALAND GAZETTE.

2421

TABLE VI.—RUBBER-INSULATED FLEXIBLE CABLES FOR USE WITH PORTABLE APPLIANCES : CURRENT-CARRYING CAPACITY.

Nominal Area of Conductor.	No. and Diameter (in Inches) of Wires comprising Conductor.	Maximum Current Permissible (Subject to Voltage Drop.)
Sq. in.		Two Conductors.
0·01	140/·010	Amps. 20
0·0145	195/.010	24
0·0225	296/·010	30
0·03	266/·012	35
0·04	368/·012	42

An earth-wire, whether insulated or not, forming part of a flexible cable is not deemed to be a conductor for the purpose of this table.

TABLE VII.—FLEXIBLE CORDS : DIMENSIONS AND RESISTANCE OF CONDUCTORS.

Nominal Area.	Number and Diameter(In.) of Wires comprising Conductor.	Ordinary Flexible Cords.	Flexible Cords with Tough Rubber Sheathing.
		Resistance per 1,000 Yards at 60° F.	Resistance per 1,000 Yards at 60° F.
		Maximum allowable Standard for Plain Wires.	Number and Diameter(In.) of Wires comprising Conductor.
1.	2.	3.	4.
Sq. in.	Ohms.	Ohms.	Ohms.
0·0006	14/·0076	39·7	40·5
0·001	23/·0076	24·2	24·6
0·0017	40/·0076	13·9	14·2
0·003	70/·0076	7·94	8·10
0·0048	110/·0076	5·05	5·15
0·007	162/·0076	3·43	3·50

5 tinned copper ; 2 tinned steel. † 9 tinned copper ; 2 tinned steel. ‡ All tinned copper.

TABLE VIII.—FLEXIBLE CORDS : THICKNESS OF INSULATION AND CURRENT-CARRYING CAPACITY.

Number and Diameter (in inches) of Wires comprising Conductor.	Minimum Thickness of Dielectric (Ordinary Flexible Cords).	Flexible Cords with Tough Rubber Sheathing.	Maximum Current permissible (subject to Voltage-drop).
Pure and Vulcanizing Rubber.	Pure and Vulcanizing Rubber.	Thick- ness of Tough Rubber.	Over-all Diameter.
High Insulation (Kind 1).	Medium Insulation (Kind 2).	In.	In.
1.	2.	3.	4.
Sq. in.	In.	In.	In.
14/·0076	0·020	0·033	0·015
23/·0076	0·020	0·034	0·015
40/·0076	0·020	0·035	0·015
70/·0076	0·020	0·036	0·015
110/·0076	0·020	0·038	0·015
162/·0076	0·020	0·039	—

An earth-wire, whether insulated or not, forming part of a flexible cord is not deemed to be a conductor for the purpose of this table.

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VUW Te Waharoa — NZ Gazette 1927, No 48

NZLII — NZ Gazette 1927, No 48

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🏗️ Electrical Wiring Regulations, 1927 (continued from previous page)

Domain🏗️ Infrastructure & Public Works
Dated11 July 1927
KeywordsRegulations, Electrical Wiring, Safety, Compliance, Conductors, Cables, Current-carrying Capacity, Insulation Resistance, Tables

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