Article 427: Fixed Electric Heating Equipment for Pipelines and Vessels

Article 427 Fixed Electric Heating Equipment for Pipelines and Vessels

I. General

427.1

Scope

427.2

Definitions

427.3

Application of Other Articles

427.4

Continuous Load

 

II. Installation

427.10

General

427.11

Use

427.12

Thermal Protection

427.13

Identification

 

III. Resistance Heating Elements

427.14

Secured

427.15

Not in Direct Contact

427.16

Expansion and Contraction

427.17

Flexural Capability

427.18

Power Supply Leads

427.19

Electrical Connections

427.20

Marking

427.22

Equipment Protection

427.23

Grounded Conductive Covering

 

IV. Impedance Heating

427.25

Personnel Protection

427.26

Isolation Transformer

427.27

Voltage Limitations

427.28

Induced Currents

427.29

Grounding

427.30

Secondary Conductor Sizing

 

V. Induction Heating

427.35

Scope

427.36

Personnel Protection

427.37

Induced Current

 

VI. Skin Effect Heating

427.45

Conductor Ampacity

427.46

Pull Boxes

427.47

Single Conductor Enclosure

427.48

Grounding

 

VII. Control and Protection

427.55

Disconnecting Means

427.56

Controls

427.57

Overcurrent Protection






Pocket Guide to the National Electrical Code 2005
Pocket Guide to the National Electrical Code(R), 2005 Edition (8th Edition)
ISBN: 0131480014
EAN: 2147483647
Year: 2004
Pages: 120
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