New Mexico CID Residential Water Well Pump Installer Examination

Under New Mexico CID classification ES-10R, residential water well pump work is limited to which electrical rating?

• A120/240 volts or less, single-phase, 15 horsepower or less
• B480 volts or less, three-phase, 25 horsepower or less
• C600 volts or less, single- or three-phase, with no horsepower limit
• D120 volts only, single-phase, 5 horsepower or less

Which of the following is outside the ES-10R residential water well pump installer classification?

• AA single-phase variable-frequency drive serving a 5-horsepower dwelling well pump
• BBranch-circuit conductors from the dwelling panelboard to the well-pump location
• CA new 200-ampere electrical service for the dwelling
• DA 4 kW photovoltaic array dedicated only to the residential pumping equipment

For a 120/240-volt residential well-pump panelboard, NEC 110.26(A)(1) generally requires a minimum working-space depth in front of the equipment of:

• A24 inches
• B30 inches
• C36 inches
• D48 inches

Per NEC Article 100, a well-pump disconnect is “in sight from” the controller only if it is visible and not more than how far away?

• A25 feet
• B100 feet
• C75 feet
• D50 feet

Per NEC 110.3(B), listed well-pump control equipment shall be installed and used in accordance with:

• AThe serving utility’s unwritten field practice only
• BManufacturer advertising literature in place of the listing instructions
• CThe installer’s preferred torque values even if they conflict with the listing
• DAny instructions included in the listing or labeling

A receptacle installed in a residential well pit or well enclosure that is subject to weather is generally classified as being in a:

• ADry location
• BDamp location only if it has a flap cover
• CWet location
• DClass I, Division 1 hazardous location solely because water is present

NEC 110.26(A)(2) requires the working space in front of a well-pump panelboard to be at least as wide as the equipment and not less than:

• A24 inches
• B42 inches
• C36 inches
• D30 inches

Unless a New Mexico well-enclosure exception applies, NEC 110.26(A)(3) requires the working-space height in front of a panelboard to be at least:

• A5 feet
• B6 feet
• C6 feet 6 inches
• D8 feet

A metallic well-pump disconnect mounted outdoors at grade, exposed to rain, must have an enclosure type suitable for a wet location. Which enclosure type is commonly accepted for that rainproof outdoor use?

• AType 1
• BType 4X only; Type 3R is never permitted outdoors
• CType 12
• DType 3R

Unless the equipment is listed and marked otherwise, NEC 110.14(C)(1)(a) requires conductor temperature ratings for circuits rated 100 amperes or less, or marked for 14 AWG through 1 AWG conductors, to be selected from which column?

• AThe 60°C column of Table 310.16
• BThe 75°C column of Table 310.16
• CThe 90°C column of Table 310.16
• DThe 110°C column used for fixture wire

NEC 110.9 requires the interrupting rating of a well-pump circuit breaker to be not less than:

• AThe motor full-load current from Table 430.248
• BThe locked-rotor current divided by six
• C125 percent of the dwelling service rating
• DThe current available at the line terminals of the equipment

A luminaire installed in a residential well pit that is subject to dripping or splashing water must be:

• AAny dry-location luminaire if it is mounted above 8 feet
• BA luminaire listed only for damp locations
• CA Type IC recessed luminaire even if it is surface-mounted
• DIdentified for use in a wet location

A 125-volt, 15-ampere receptacle installed in a wet-location residential well enclosure must have which of the following?

• AGFCI protection and an enclosure that is weatherproof only when the cover is closed and n…
• BA standard indoor receptacle if it is on a dedicated pump circuit
• CAFCI protection only; GFCI is never required at a well enclosure
• DGFCI protection, a weather-resistant receptacle, and an extra-duty enclosure that remains…

NEC 110.12(A) requires unused openings in a well-pump panelboard or control enclosure to be:

• ALeft open for ventilation of the pump controls
• BFilled with wood plugs if the enclosure is Type 3R
• CCovered with duct tape until the final inspection
• DClosed to afford protection substantially equivalent to the wall of the enclosure

A 240-volt, single-phase residential well-pump panelboard is installed with exposed live parts on one side and grounded concrete on the other (Condition 2). What working-space depth does Table 110.26(A)(1) require?

• A3 feet, because voltage to ground is 120 volts
• B3 feet 6 inches, because the circuit is 240 volts
• C4 feet, because Condition 2 always requires 4 feet
• D5 feet, matching the New Mexico well-pit headroom floor

NEC 110.26(E)(1) dedicated equipment space above a well-pump panelboard indoors extends from the floor to a height of 1.8 m (6 ft) above the equipment or to the structural ceiling, whichever is lower, and is reserved for:

• APlumbing, ducts, and hydronic piping if they are insulated
• BStorage shelves if they are nonmetallic
• CAny building system as long as 3 feet of working space remains in front
• DThe panelboard, associated electrical equipment, and raceways or cables entering that equ…

NMAC 14.10.4.11, amending NEC 110.2, generally requires electrical wiring, equipment, or material approval to be based on listing and labeling by:

• AAny internet marketplace seller that prints a CE mark
• BA county assessor’s equipment affidavit
• CThe pump manufacturer’s in-house quality stamp only
• DA nationally recognized testing laboratory recognized by OSHA

NEC 90.1 describes the purpose of the Code. Which statement is correct?

• AThe NEC is intended as a design specification and an instruction manual for untrained per…
• BThe NEC applies only to utility-owned generation and transmission equipment.
• CCompliance with the NEC guarantees an efficient, convenient, or adequate installation for…
• DThe NEC contains provisions considered necessary for safety and is not intended as a desi…

In NEC Article 100, the circuit conductors between the final overcurrent device protecting the circuit and the well-pump outlet are a:

• AService lateral
• BFeeder
• CBranch circuit
• DGrounding electrode conductor

NEC 210.19(A) requires branch-circuit conductors to have an ampacity not less than the maximum load to be served. For a continuous load, that ampacity must be not less than:

• A100 percent of the continuous load
• B115 percent of the continuous load
• C125 percent of the continuous load
• D250 percent of the continuous load

A 20-ampere, 125-volt receptacle installed in a dwelling well enclosure for maintenance tools is supplied by:

• AA feeder, because it leaves the dwelling
• BA grounding electrode conductor if the receptacle is GFCI-protected
• CA service conductor, because the well is outdoors
• DA branch circuit originating at the final overcurrent device

NEC 215.2(A)(1) requires feeder conductors to have an allowable ampacity not less than:

• AThe noncontinuous load plus 125 percent of the continuous load, before adjustment or corr…
• B80 percent of the next standard overcurrent device
• CThe sum of all motor full-load currents with no added percentage
• DThe rating of the largest branch-circuit breaker in the panelboard

NEC 225.18 requires overhead 240-volt well-pump feeder conductors crossing a residential driveway to have a minimum clearance above grade of:

• A10 feet
• B18 feet
• C15 feet
• D12 feet

NEC 225.26 prohibits using which of the following to support overhead well-pump branch-circuit or feeder conductors?

• AA rigid metal conduit mast installed for the purpose
• BA pressure-treated timber set to the required depth
• CA building structure designed to support the conductors
• DVegetation such as trees

NMAC 14.10.4.12, amending NEC 210.19, requires conductors for branch circuits to be sized to prevent excessive voltage drop. The NEC informational note commonly referenced for a branch circuit plus feeder recommends that the total voltage drop not exceed:

• A2 percent
• B10 percent because well motors have high starting current
• C8 percent on the well-pump circuit alone
• D3 percent on the branch circuit or feeder, and 5 percent total to the farthest outlet

NEC 225.6(A)(1) requires overhead open individual branch-circuit or feeder conductors, 1000 volts or less, in spans up to 15 m (50 ft) to be not smaller than:

• A14 AWG copper or 12 AWG aluminum
• B12 AWG copper or 10 AWG aluminum
• C10 AWG copper or 8 AWG aluminum
• D8 AWG copper or 6 AWG aluminum

A feeder supplies a detached residential well house. NEC 215.6 and 250.32(B) generally require that feeder to include:

• AOnly two ungrounded conductors; the well-house panel may use the earth as the equipment g…
• BA second grounded (neutral) conductor used as the equipment grounding conductor
• CA grounding electrode conductor in place of an equipment grounding conductor
• DAn equipment grounding conductor run with the feeder conductors

NMAC 14.10.4.12, amending NEC 210.19, requires conductors of general-purpose branch circuits that supply more than one receptacle outlet for cord-and-plug-connected portable loads to be not smaller than:

• A14 AWG copper or 12 AWG copper-clad
• B8 AWG copper only
• C10 AWG copper or 8 AWG copper-clad
• D12 AWG copper or 10 AWG copper-clad

Which of the following is a standard overcurrent-device ampere rating listed in NEC 240.6(A)?

• A18 amperes
• B22 amperes
• C25 amperes
• D55 amperes

Unless 240.4(E) or (G) applies, NEC 240.4(D) limits overcurrent protection of 12 AWG copper conductors to not more than:

• A15 amperes
• B30 amperes
• C25 amperes
• D20 amperes

NEC 240.24(A) requires overcurrent devices to be readily accessible. NEC 240.24(E) and (F) also prohibit locating them:

• AIn a dwelling bathroom or over the steps of a stairway
• BIn a garage if the well-pump feeder originates there
• COutdoors in a Type 3R enclosure
• DIn a dedicated well-house electrical room

Why may a 10 AWG copper well-pump motor circuit be protected by a 40-ampere inverse-time breaker even though 240.4(D) lists 30 amperes for 10 AWG?

• ABecause all outdoor circuits are exempt from Article 240
• BBecause well pumps are classified as fire pumps under Article 695
• CBecause 10 AWG copper has a 60°C ampacity of 40 amperes
• DBecause 240.4(G) permits motor-circuit conductors to be protected under Article 430 inste…

For conductors other than those in 240.4(D), (E), or (G), if the ampacity does not correspond to a standard device size and does not exceed 800 amperes, NEC 240.4(B) generally permits:

• AOnly the next lower standard overcurrent device
• BNo overcurrent device if the run is less than 10 feet
• CAny overcurrent device up to 250 percent of ampacity
• DThe next higher standard overcurrent-device rating

Using NEC Table 430.248 and Table 430.52, what is the maximum standard inverse-time circuit-breaker rating for a 3-horsepower, 230-volt, single-phase residential well-pump motor if the next-higher-standard-size permission of 430.52(C)(1) Exception No. 1 is used?

• A30 amperes
• B35 amperes
• C45 amperes
• D60 amperes

NEC 250.119 generally requires a wire-type equipment grounding conductor to be identified by a continuous:

• AWhite or gray finish
• BRed finish when installed with a well-pump circuit
• COrange finish when used on a high-leg system
• DGreen finish, or green with one or more yellow stripes, or to be bare

NEC 250.4(A)(5) requires an effective ground-fault current path so that:

• ALightning current is forced onto the well casing instead of the service
• BNeutral current is encouraged to flow on metal water piping
• CThe well motor can use the earth as a substitute for an equipment grounding conductor
• DThe overcurrent device will operate and clear a ground fault

NEC 250.52(A)(1) includes which well-related item as part of a metal underground water-pipe grounding electrode?

• AA plastic well casing within 10 feet of the dwelling
• BA pressure tank sitting on a wooden stand in the garage
• CThe submersible pump motor housing only, even if it is not bonded to the pipe
• DAny metal well casing that is bonded to the metal underground water pipe

To qualify as a grounding electrode under NEC 250.52(A)(1), a metal underground water pipe must be in direct contact with the earth for not less than:

• A5 feet
• B8 feet
• C10 feet
• D20 feet

NEC 250.53(G) requires a rod electrode to be installed so that at least how much of the rod is in contact with the soil?

• A4 feet
• B6 feet
• C8 feet
• D10 feet

When a metal underground water pipe, including a bonded metal well casing, is used as a grounding electrode, NEC 250.53(D)(2) requires it to be:

• ASupplemented by an additional electrode of a type specified in 250.52(A)
• BThe sole electrode; no supplement is ever required
• CDisconnected from the interior piping to prevent electrolysis
• DBonded only to the well-pump equipment grounding conductor and not to the service

NEC 250.66(A) states that the grounding electrode conductor connected solely to a rod, pipe, or plate electrode is not required to be larger than:

• A6 AWG copper
• B8 AWG copper
• C4 AWG copper
• D2 AWG copper

Where a supplemental rod electrode is required, NEC 250.53(A)(3) requires it to be spaced not less than how far from the first rod?

• A6 feet
• B3 feet
• C10 feet
• D20 feet

NEC 250.53(D)(1) requires continuity of the grounding path or the bonding connection to interior piping not to rely on:

• AWater meters, filtering devices, or similar equipment
• BA listed grounding clamp
• CA bonding jumper sized from Table 250.66
• DThe metal well casing where it is bonded to the pipe

NEC 250.68(C)(1) permits interior metal water piping to extend the grounding-electrode-conductor connection to a metal underground water-pipe electrode only if that interior piping is located not more than:

• A5 feet from the point of entrance to the building
• B2 feet from the point of entrance to the building
• C10 feet from the water heater
• D25 feet from the service disconnect

Using NEC Table 250.122, the minimum copper equipment grounding conductor for a 60-ampere well-pump branch-circuit breaker is:

• A14 AWG
• B12 AWG
• C10 AWG
• D8 AWG