Section 3111F

This section provides minimum standards for electrical systems at marine oil terminals.

Electrical systems include the incoming electrical service and components, the electrical distribution system, branch circuit cables and the connections, including, but not limited to:

1. Lighting, for operations, security and navigation

2. Controls for mechanical and electrical equipment

3. Supervision and instrumentation systems for mechani- cal and electrical equipment

4. Grounding and bonding

5. Corrosion protection through cathodic protection

6. Communications and data handling systems

7. Fire detection systems

8. Fire alarm systems

9. Emergency shutdown systems (ESD) All electrical systems shall conform to API RP 540 [11.1] and the California Electrical Code [11.2].

See Section 3101F.3 for definitions of “new” (N) and “existing” (E).

Area classifications shall be determined in accordance with API RP 500 [11.3], API RP 540 [11.1] and Articles 500, 501, 504, 505 and 515 of the California Electrical Code [11.2]. A marine oil terminal shall have a current set of scaled plan drawings, with clearly designated areas showing the hazard class, division and group. The plan view shall be supple- mented with sections, elevations and details to clearly delin- eate the area classification at all elevations starting from low water level. The drawings shall be certified by a professional electrical engineer. The plans shall be reviewed and revised when modifications to the structure, product or equipment change hazardous area identifications or boundaries.

All electrical equip- ment, cables and conductors shall be clearly identified by means of tags, plates, color coding or other effective means to facilitate troubleshooting and improve safety, and shall conform to the identification carried out for the adjacent on- shore facilities (N). Topics for such identification are found in Articles 110, 200, 210, 230, 384, 480 and 504 of the Cali- fornia Electrical Code [11.2]. Existing electrical equipment (E) shall be tagged.

Where identification is necessary for the proper and safe operation of the equipment, the marking shall be clearly visi- ble and illuminated (N/E). A coded identification system shall apply to all circuits, carrying low or high voltage power, con- trol, supervisory or communication (N).

hazardous locations (N/E). Purged or pressurized enclo-

sures shall be capable of preventing the entry of combustible gases into such spaces, in accordance with NFPA 496 [11.4]. Special emphasis shall be placed on reliability and ease of operation. The pressurizing equipment shall be electrically monitored and alarms shall be provided to indicate failure of the pressurizing or purging systems.

Pressurized control rooms shall conform to Chapter 7 of NFPA 496 [11.4].

Where critical circuits are used for spill prevention, fire control or life safety, an alternative service derived from a separate source and conduit system, shall be located at a safe distance from the main power ser- vice. A separate feeder from a double-ended substation or other source backed up by emergency generators will meet this requirement. A stored energy emergency power system (SEEPS) shall be provided for control and supervisory cir- cuits associated with ESD systems (N), see Section 3111F.5.1.

1. Electrical, instrument and control systems used to acti- vate equipment needed to control a fire or mitigate its consequences shall be protected from fire and remain operable for 15 minutes in a 2000°F fire, unless designed to fail-safe during fire exposure. The tempera- ture around these critical components shall not exceed 200°F during 15 minutes of fire exposure (N).

2. Wiring in fireproofed conduits shall be derated 15 per- cent to account for heat buildup during normal opera- tion. Type MI (mineral insulated, metal sheathed per the California Electrical Code [11.2]) cables may be used in lieu of fireproofing of wiring (N).

3. Emergency cables and conductors shall be located where they are protected from damage caused by traf- fic, corrosion or other sources (N).

4. Allowance shall be made for electrical faults, overvolt- ages and other abnormalities (N). Where solid state motor controls are used for starting and speed control, corrective measures shall be incorporated for mitigating the possible generation of harmonic currents that may affect the ESD or other critical systems (N).

3111F.5.1 Emergency power systems. Emergency power systems shall be installed (N) and maintained (N/E) per NFPA 110 [11.5]. This does not include stored energy sys- tems. Stored energy emergency power systems (SEEPS) shall be installed (N) when necessary to maintain continu- ous uninterruptable power to critical systems. SEEPS shall be installed (N) and maintained (N/E) per NFPA 111

[11.6].

1. All electrical equipment shall be effectively grounded as per Article 250 of the California Electrical Code

[11.2]. All noncurrent carrying metallic equipment, structures, piping and other elements shall also be effectively grounded.

31F-80 2022 CALIFORNIA BUILDING CODE

Copyright © 2022 by, or licensed to, International Code Council, Inc. (ALL RIGHTS RESERVED); licensed to California Building Standards Commission pursuant to License Agreement. No further reproductions is authorized. Any unauthorized reproduction or distribution is a violation of the federal copyright act and the license agreement, and subject to civil and criminal penalties thereunder.

2. Grounding shall be considered in any active corrosion protection system for on-shore piping, submerged sup- port structures or other systems. Insulation barriers, including flanges or nonconducting hoses shall be used to isolate cathodic protection systems from other elec- trical/static sources. None of these systems shall be compromised by grounding or bonding arrangements that may interconnect the corrosion protection systems or interfere with them in any way that would reduce their effectiveness.

3. Bonding of vessels to the MOT structure is not permit- ted.

4. Whenever flanges of pipelines with cathodic protection are to be opened for repair or other work, the flanges shall be bonded prior to separation.

5. Direct wiring to ground shall be provided from all tow- ers, loading arms or other high structures that are sus- ceptible to lightning surges or strikes.

All electrical systems and components shall conform to National Electrical Manu- facturers Association (NEMA) standards or be certified by a Nationally Recognized Testing Laboratory (NRTL).

3111F.8.1 Illumination Locations. At a minimum, MOTs shall provide fixed lighting (or luminaires) that illumi- nates the following areas:

1. Transfer connection points on the MOT

2. Transfer connection points on any barge moored at the MOT that may transfer oil

3. Transfer operations work areas on the MOT

4. Transfer operations work areas on any barge moored at the MOT that may transfer oil

5. Areas defined in Sections 17.4 and 24.6.4 of ISGOTT [11.7], as appropriate

Lighting shall be located or shielded so as not to mis- lead or otherwise interfere with off-site areas as governed by federal, state and local agency requirements.

3111F.8.2 Illumination Levels. The minimum illumina- tion levels shall be as follows:

1. 5.0 footcandles (54 lux) at transfer connection points

2. 1.0 footcandle (11 lux) in transfer operations work and other areas

Where the illumination appears to the Division to be inadequate, the Division may require verification by instrument of the levels of illumination. The illumination levels shall be verified by measurement at the locations defined in Section 3111F.8.1, if required. All measure- ments shall be taken on a horizontal plane, 3 feet above the MOT and barge deck or walking surface (33 CFR