- Section 1 - Benefits Offered By Fuses
2008 SPD Introduction 3
Benefits Offered By Fuses 5
Fuseology 6 - 31
- Overcurrent and Voltage Ratings 6
- Voltage Ratings & Slash Voltage Ratings 7
- Amp Rating and Interrupting Rating 8 - 10
- Selective Coordination & Current Limiting 11
- Non Time-Delay Fuse Operation 12
- Dual-Element, Time-Delay Fuse Operation 13
- Dual-Element Fuse Benefits 14 - 15
- Branch Circuit & Application Limited Overcurrent Protective Devices 16 - 20
- Branch Circuit Fuse Selection Chart (600V or less) 21
- Branch Circuit Fuse Dimensions 22 - 23
- Cooper Bussmann Branch Circuit, Power Distribution Fuses 24 - 25
- Disconnects, Panelboards, & One-Time Fuses 26
- Fuse Holders, Fuse Blocks, Power Distribution Blocks & Surge Suppression 27
- High Speed Fuses 28 - 29
- Medium Voltage Fuses 30 - 31
- Section 2 - Applying Interrupting Ratings
Applying Interrupting Rating: Circuit Breakers 32 - 57
- Interrupting Rating vs. Interrupting Capacity 32 - 34
- Single-Pole Interrupting Capability 35 - 40
- Series Rating: Protecting Circuit Breakers 41 - 46
- Square D Series Rating Chart 47 - 48
- Cutler-Hammer Series Rating Chart 49 - 51
- General Electric Series Rating Chart 52 - 55
- Siemens Series Rating Chart 56 - 57
- Section 3 - Conductor Protection
Conductor Protection — General 58 - 60
- General 58
- Small Conductors 58
- Tap Conductors 58-59
Cable Limiters — Applications 61
Conductors & Terminations — Applications 62 - 64
Equipment Protection 65 - 75
- General 64 - 68
- Transformers — 600V or Less 69 - 70
- Transformers — Over 600V 71 - 72
- Photovoltaic (PV) Systems 73 - 75
Component Protection 76 - 86
- Introduction and Current-Limitation 76
- How to Use Current-Limitation Charts 77 - 78
- Wire & Cable 79 - 81
- Tap Conductor Sizing 81
- Small Wire (16 & 18 AWG) 81
- Busway 82-83
- HVAC and Refrigeration Equipment 84
- Transfer Switches 85
- Ballasts 86
- Section 4 - Industrial Control Panels
Industrial Control Panels 87 - 107
- Short-Circuit Current Rating Marking Requirements 87-88
- Determining Assembly SCCR: Two Sweep Method 89 - 90
- Umbrella Fuse Limits 91 - 93
- Determining Assembly SCCR: Example 94 - 104
- Increasing Assembly SCCR 105-107
- Section 5 - Selective Coordination
Selective Coordination 108 - 146
- Introduction 108
- Fuses 109 - 111
- Fuse Selectivity Ratio Guide 112 -113
- Fusible Lighting Panels 114
- Fuse Selective Coordination Example 115
- Circuit Breakers: Operation Basics 116 -118
- Circuit Breakers: Achieving Selective Coordination 119 -125
- Fuse & Circuit Breaker Mixture 126
- Mandatory Selective Coordination Requirements 127
- Why Selective Coordination is Mandatory 128 -130
- System Considerations 131 -135
- OCPD Choices for Selective Coordination 136 -137
- Inspection Checklist 138
- Objections & Misunderstandings 139-144
- Elevator Circuits 145 -146
Ground Fault Protection 147 - 157
- Introduction & Requirements 147 - 149
- Overcurrent Protective Devices 150
- GFPR Considerations 151 - 155
- Current-Limitation 156 - 157
- Section 6 - Electrical Safety
Electrical Safety 158 - 170
- Introduction 158 -159
- Arc-Flash Protection 160 -162
- Maintenance Considerations 163
- Arc-Flash Hazard Analysis 164
- Arc-Flash Incident Energy Calculator 165 -167
- Arc-Flash Hazard Analysis 168 -169
- Arc-Flash Protection Marking 168 -170
- Section 7 - Devices for Motor Circuits
Devices for Motor Circuits 171 - 180
- Branch Circuit Devices and Disconnect Selection Tables: 171 - 173
- Motor Branch Circuit Devices 174 -179
- Motor Circuit Branch Circuit Protection — Is Resettability of Value? 180
Motor Protection 181 - 189
- Voltage Unbalance & Single-Phasing 181 - 186
- Basic Explanation 187 - 189
Motor Branch Circuit Protection — NEC® 430.52 Explanation 190
Motor Circuit Notes 191
Motor Circuits — Group Switching 192
Motor Circuit Protection Tables 193 - 207
- NEC® Article 430 and Tables Explanation 193 - 194
- 200Vac Three-Phase Motors & Circuits 194 - 195
- 208Vac Three-Phase Motors & Circuits 195 - 196
- 230Vac Three-Phase Motors & Circuits 197 - 198
- 460Vac Three-Phase Motors & Circuits 198 - 199
- 575Vac Three-Phase Motors & Circuits 200 - 201
- 115Vac Single-Phase Motors & Circuits 202
- 230Vac Single-Phase Motors & Circuits 203
- 90Vdc Motors & Circuits 204
- 120Vdc Motors & Circuits 205
- 180Vdc Motors & Circuits 206
- 240Vdc Motors & Circuits 206 - 207
Motor Protection — Tips for Electricians & Maintenance Crews 208
Motor Starter Protection 209 - 212
- Graphic Explanation 209 - 210
- Low Voltage Motor Controllers 211
- Type 1 vs. Type 2 Protection 212
Motor Controller & Fuse Selection for Type 2 Protection 213 - 227
- General Electric Company — IEC 213
- General Electric Company — NEMA 214 - 216
- Rockwell Automation, Allen-Bradley — IEC 217
- Rockwell Automation, Allen-Bradley — NEMA 218
- Square D Company — IEC 219 - 221
- Square D Company — NEMA 222
- Siemens — IEC 223
- Siemens — NEMA 224
- Cutler Hammer Freedom Series — IEC 225 - 226
- Cutler Hammer Freedom Series — NEMA 227
Motor Circuits with Power Electronic Devices — Power Electronic Device Circuit Protection 228 - 230
Motor Circuit Protection — Group Motor Protection 231
Motor Control Circuit Protection 232 - 235
Medium Voltage Motor Circuits — R-Rated Medium Voltage Fuses 236
- Section 8 - Cost of Ownership, Calculations & Sizing Charts
Cost of Ownership 237 - 238
- Fusible Equipment vs. Circuit Breaker Equipment 237
- Preventive Maintenance 238
Short Circuit Current Calculations 239 - 245
- Introduction 239
- Three-Phase Short Circuits 241
- Single-Phase Short Circuits 242 - 243
- Impedance & Reactance Data 244
- Conductors & Busways "C" Values 245
Voltage Drop Calculations 246 - 248
- Ratings of Conductors and Tables to Determine Volt Loss 246
- Copper Conductors — Ratings & Volt Loss 247
- Aluminum Conductors — Ratings & Volt Loss 248
Fuse Diagnostic Sizing Charts 249 - 253
- Ballasts 249
- Capacitors (NEC® 460) 249
- Electric Heat (NEC® 424) 250
- Mains, Feeders, Branches 250
- Motor Loads (NEC® 430) 251
- Solenoids (Coils) 251
- Transformers 600V Nominal or Less 252
- Transformers Over 600V Nominal 253
- Solid State Devices 253
Fuse Sizing Guide — Building Electrical Systems 254
Fuse Specifications 255 - 256
- Suggestions 255
- Suggested Fuse and Fusible Equipment Specifications 256
Cooper Bussmann Current-Limiting Fuse Let-Through Data 257 - 261
Glossary 262 - 263
Electrical Formulas 263
2008 NEC® Section Index 264
Index 265-266
Fuse Cross Reference & Low-Peak Fuse Upgrade Inside Back Cover
