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 |
Article 90 Introduction
General
Wiring and Protection
- Article 200 Use and Identification of Grounded Conductors
- Article 210 Branch Circuits
- Article 215 Feeders
- Article 220 Branch-Circuit, Feeder, and Service Calculations
- Article 225 Outside Branch Circuits and Feeders
- Article 230 Services
- Article 240 Overcurrent Protection
- Article 250 Grounding and Bonding
- Article 280 Surge Arresters
- Article 285 Transient Voltage Surge Suppressors (TVSSs)
Wiring Methods and Materials
- Article 300: Wiring Methods
- Article 310 Conductors for General Wiring
- Article 312 Cabinets, Cutout Boxes, and Meter Socket Enclosures
- Article 314 Outlet, Device, Pull, and Junction Boxes; Conduit Bodies; Fittings; and Handhole Enclosures
- Article 320 Armored Cable Type AC
- Article 322 Flat Cable Assemblies Type FC
- Article 324 Flat Conductor Cable Type FCC
- Article 326 Integrated Gas Spacer Cable Type IGS
- Article 328 Medium-Voltage Cable Type MV
- Article 330 Metal-Clad Cable Type MC
- Article 332 Mineral-Insulated, Metal-Sheathed Cable Type MI
- Article 334 Nonmetallic-Sheathed Cable Types NM, NMC, and NMS
- Article 336 Power and Control Tray Cable Type TC
- Article 338 Service-Entrance Cable Types SE and USE
- Article 340 Underground Feeder and Branch-Circuit Cable Type UF
- Article 342 Intermediate Metal Conduit Type IMC
- Article 344 Rigid Metal Conduit Type RMC
- Article 348 Flexible Metal Conduit Type FMC
- Article 350 Liquidtight Flexible Metal Conduit Type LFMC
- Article 352 Rigid Nonmetallic Conduit Type RNC
- Article 353 High Density Polyethylene Conduit Type HDPE Conduit
- Article 354 Nonmetallic Underground Conduit with Conductors Type NUCC
- Article 356 Liquidtight Flexible Nonmetallic Conduit Type LFNC
- Article 358 Electrical Metallic Tubing Type EMT
- Article 360 Flexible Metallic Tubing Type FMT
- Article 362 Electrical Nonmetallic Tubing Type ENT
- Article 366 Auxiliary Gutters
- Article 374 Cellular Metal Floor Raceways
- Article 382 Nonmetallic Extensions
- Article 384 Strut-Type Channel Raceway
- Article 386 Surface Metal Raceways
- Article 388 Surface Nonmetallic Raceways
- Article 390 Underfloor Raceways
- Article 392 Cable Trays
- Article 394 Concealed Knob-and-Tube Wiring
- Article 396 Messenger Supported Wiring
- Article 398 Open Wiring on Insulators
Equipment for General Use
- Article 400: Flexible Cords and Cables
- Article 402: Fixture Wires
- Article 404: Switches
- Article 406: Receptacles, Cord Connectors, and Attachment Plugs (Caps)
- Article 408: Switchboards and Panelboards
- Article 409: Industrial Control Panels
- Article 410: Luminaires (Lighting Fixtures), Lampholders, and Lamps
- Article 411: Lighting Systems Operating at 30 Volts or Less
- Article 422: Appliances
- Article 424: Fixed Electric Space Heating Equipment
- Article 426: Fixed Outdoor Electric De-Icing and Snow-Melting Equipment
- Article 427: Fixed Electric Heating Equipment for Pipelines and Vessels
- Article 430: Motors, Motor Circuits, and Controllers
- Article 440: Air Conditioning and Refrigerating Equipment
Special Occupancies
- Article 500 Hazardous (Classified) Locations, Classes I, II, and III, Divisions 1 and 2
- Article 501 Class I Locations
- Article 502 Class II Locations
- Article 503 Class III Locations
- Article 504 Intrinsically Safe Systems
Special Equipment
Special Conditions
- Article 700 Emergency Systems
- Article 701 Legally Required Standby Systems
- Article 702 Optional Standby Systems
Tables
- Tables
- Notes to Tables
- Tables 11(A) and 11(B)
- Notes for Tables 11(A) and 11(B)
- Tables 12(A) and 12(B)
- Notes for Tables 12(A) and 12(B)
Annex C. Conduit and Tubing Fill Tables for Conductors and Fixture Wires of the Same Size
Annex D. Examples
- Annex D. Examples
- Example No. D1(a) One-Family Dwelling
- Example No. D1(b) One-Family Dwelling
- Example No. D2(a) Optional Calculation for One-Family Dwelling Heating Larger than Air Conditioning [See Section 220.82]
- Example No. D2(b) Optional Calculation for One-Family Dwelling, Air Conditioning Larger than Heating [See 220.82(A) and 220.82(C)]
- Example No. D2(c) Optional Calculation for One-Family Dwelling with Heat Pump(Single-Phase, 240/120-Volt Service) (See 220.82)
- Example No. D3 Store Building
- Example D3(a) Industrial Feeders in a Common Raceway
- Example No. D4(a) Multifamily Dwelling
- Example No. D4(b) Optional Calculation for Multifamily Dwelling
- Example No. D5(a) Multifamily Dwelling Served at 208Y/120 Volts, Three Phase
- Example No. D5(b) Optional Calculation for Multifamily Dwelling Served at 208Y/120 Volts, Three Phase
- Example No. D6 Maximum Demand for Range Loads
- Example No. D8 Motor Circuit Conductors, Overload Protection, and Short-Circuit and Ground-Fault Protection
- Example No. D9 Feeder Ampacity Determination for Generator Field Control
- Example No. D10 Feeder Ampacity Determination for Adjustable-Speed Drive Control [See 215.2, 430.24, 620.13, 620.14, 620.61, Tables 430.22(E), and 620.14]
- Example No. D11 Mobile Home (See 550.18)
- Example No. D12 Park Trailer (See 552.47)
Annex E. Types of Construction
Pocket Guide to the National Electrical Code(R), 2005 Edition (8th Edition)
ISBN: 0131480014
EAN: 2147483647
EAN: 2147483647
Year: 2004
Pages: 120
Pages: 120
Authors: Marvin J. Fischer
