The sub-panel breaker's trip point shall be no greater than 100% of the total current draw for the entire sub-panel. A marine technology apprenticeship will enable you to learn about restoring electrical systems onboard ships while ensuring worksite safety. Of the following which is NOT a correct way of testing a battery. What is a possible problem with installing a new solid state Voltage regulator to replace a manual one? Technician A says double pole circuit breakers must be used to provide Overcurrent protection for both the ungrounded and grounded conductors of an AC input circuit. On a brushless generator, a possible cause for low AC voltage output under load could be: Tech A says the ABYC has pull-test requirement for wiring connecting the generator to onboard circuits. If a generator is not self limiting, the power feeder conductor from the generator shall be sized to accommodate the generator's maximum rated output and shall be protected at the generator with overcurrent protection devices whose rating shall not exceed of the generator rated output . Which ABYC standard refers to the fuse in the DC positive conductor for inverter/battery charger output protection? Faulty exciter winding / diode rectifier circuit. According to the U.S. Marine Corps, the job of a Marine Corps electrician or 1141 includes installing, operating, maintaining, and repairing electrical power distribution systems, whether those systems are underground, above ground, and overhead. Technician B says that boxes are not necessary and a sealed composite tray matching what the boat already has would be fine and looks better. What is the closest distance an unshielded metallic fuel system component can be to a battery terminal? He or she may also handle emergency repairs on ships in port, in dry dock, and out at sea. We offer free estimates, & are licensed and insured. For proper inverter operation it is important to do all of the following except. Which is correct, A, B, neither or both? All terminations and junctions for AC conductors must be installed: Wha is the best tool to use for locating short-circuits? T or F: For AC wiring, the "hot" ungrounded conductor (i.e., not the insulation color) should be brass or copper colored and the "neutral" grounded conductor should be light silver colored. What wire is best suited for bonding under-water components: False. Tech B says this is technically impossible. A technician is checking a shore power cord with a clamp on AC current meter. lf a separate, independent AC powered battery charger is fitted along with an inverter/charger, the independent AC powered charger must be: To comply with ABYC requirements, a Neutral to Ground connection must be present at the inverter during which of the following conditions: In order to eliminate the neutral to ground connection when shore power is being transferred through the inverter a ________ is utilized. When testing a wet-cell battery with a hydrometer, what threshold is used to determine a bad cell? b. This is a certification course. Technician B says simultaneous opening fuses may be used for this application. ABYC certification is considered the highest level of industry certification available in the United States. False. You're installing a 500 GPH bilge pump to be used as a shower pump (just to drain the shower grey-water). Inside an enclosure requiring the use of hand-tools to open. In addition to writing uniform technical standards for the entire marine industry, ABYC has become a leader in education for marine industry professionals, technicians and boat owners by offering seminars, workshops, webinars, marine technician certification training and standards accreditation as well as numerous educational publications. As of 18 September 2016 the only applicable MED is Directive 2014/90/EU of the European Parliament and of the Council of 23 July 2014 on marine equipment and … How many amps will it draw? Why might a fully-discharged wet-cell type battery freeze? A 2000 watt inverter is operating at 50% capacity with a 90% effeciency rating. Tech A says that combined AC/DC panels boards are grounded via the DC negative bus. T or F: it is ok to install batteries directly below an uninterrupted fuel line? DC grounded conductors on new boats that are also equipped with AC systems should use what color of insulation? There could be severe radio interference from the new device. Each installed battery shall not move more than one inch in any direction when pulling force of ______ lbs or twice battery weight is applied. You have a cable that runs from a battery to a bow thruster. With the generator running and AC output frequency is low, what is the probable cause? Must be protected with dielectric insulating material. Both technicians agree that batteries have to be accessible for inspection and maintenance according to the NFPA. 1 inch, 90 lbs or 2x the battery weight, for 1 minute in each direction. What is its peak value? What is the maximum allowable trip current & time for ELCI/RCD at the main shore power input? How much current does it use: At the AC distribution panels on boats the green and white wires... Overheating at a junction point in the AC distribution panel can be caused by all of the following EXCEPT. Equipment Leakage Current Interrupter - within 10 feet of shore power connection unless an isolation transformer is located within 10' of shore power connection. What provision must be in place on any fuel line located within 12 inches of a battery terminals? What gauge wires is required for lightning protection system secondary conductors? Technician A says the AC system wiring must include a voltmeter installed on the main panelboard if the system wiring is permanently connected to a genset. Many employers in the maritime industry prefer to hire individuals with American Boat and Yacht Council (ABYC) certification. T or F: boats with an enclosed accommodation compartment shall have an audible high bilge-water alarm. A-25.5.2 Output voltage and frequency shall be in accordance with ABYC E-8, Alternating Current (AC) Electrical Systems On … Which is correct? Technician B says that they must be kept separate. Most marine inverters will shut down automatically when battery voltage falls below what voltage? How many watts Is the light bulb? If there is not a standard current rating overcurrent protection device equal to 100% of the allowable current for an AC branch circuit, the next larger standard current rating may be used provided it does not exceed _______ of the maximum allowable current . T or F: Generators that are "self-limiting" do not require overcurrent protection if the conductors used are of sufficient ampacity and sized for maximum current available. Topics include AC power from shore and generators, battery systems, panel boards, cable installation, safety equipment, and troubleshooting tips. T or F: On an AC and DC combined panel that it affixed with screws, the energized AC parts on the back of the panel must be covered. BMEEA are industry leaders consistently updating the training to be internationally relevant. Shore power neutral is tied to ground on the shore side. A certification for vessel communications will include basic electrical practices for marine environments. British Marine offers courses in marine electronics installation and electrical installation in order to become either a BMEEA-certified Marine Electrical or Electronics Installer. Welcome to JTB Marine. T or F: Compared to deep cycle (house) batteries, cranking batteries will have thicker lead plates to facilitate the higher, short-duration current draws. High frequency transformers typically run _____ than traditional magnetic transformers. Multi wire plugs and receptacles used in conjunction with harness type wiring systems shall incorporate means except: What is the allowable amps of a single #2 AWG conductor outside the engine space, rated at 105 C? If installed in a head, galley, machinery space, or on a weather deck, a receptacle shall be protected by. Which of the foillowing is the most probably cause? According to ABYC Standard E-11, the distance from the shore power inlet to the main circuit over current protection should be within. Name three common gasses other than CO that may trigger a CO alarm: Name two likely possible causes of falsely trigger fire alarm in an engine room space. (only when installed in location that required GFCI per ABYC E-11). Which of the following metals may exhibit two distinct corrosion potentials (and occupy two different positions on the galvanic scale) depending on the composition of the electrolyte, other environmental factors, and/or surface conditions of the metal itself? The minimum amp circuit breaker that should be used to protect a 120VAC water heater with a 1600 watt element would be rated at ________ amps. To test the cable a technician would use the DVOM and check voltage at what two points? False. Tech B says that such panel boards should be grounded to the AC grounding bus. The tool of choice for testing AC generator winding insulation integrity is a: Technician A says that a generator's neutral and ground must be connected together at the generator. Technician B says as long as total output load is, d) If its maximum overload current exceeds 120% of its rated output. When troubleshooting a charging problem with a voltage regulator, a technician should find the brown wire: c. 2-450 CCA batteries in parallel (see E-11.6.1.2.1). Tech B says that the panel board should be grounded to the AC grounding bus. 613 Third Street, Suite 10 - Annapolis, MD 21403 - Phone: 410.990.4460 - Fax: 410.990.4466 While out cruising (away from the dock), batteries on a typical cruiser have what percentage of charge? The customer reports that the generator will not crank from either the local or remote control panel. (A-28.11.1). Fire hazard. 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