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MWTP-50, MWTP-50C + PWR-25 & MWTP-250 Electrical One-Line Schematics, Panel Schedules & Safety Ladder

For Licensed Electrical Contractor, UL-508A Panel Shop & Electrical PE Review • NEC Articles 250, 430, 445, 551 & UL-508A Reference

PRELIMINARY FOR PE & UL-508A SHOP REVIEW (REV B — NOV 2026): Confirm exact motor full-load amps (FLA) from nameplate data prior to ordering circuit breakers, overload relays, and VFD line reactors. All control panels must bear a UL-508A industrial control panel label with verified Short-Circuit Current Rating (SCCR ≥ 25 kA @ 480V / 10 kA @ 240V).
DWG SET: E-101 THROUGH E-105
DWG E-101 SYSTEM: MWTP-50-GN22 ("KITCHENSHIELD-50") • 22-FT COMPACT GOOSENECK

240V / 120V Single-Phase Power One-Line Schematic & Phase-Converting VFD Bus

Allows operation from a standard restaurant 240V 50A twist-lock shore receptacle OR the onboard 20 kW diesel generator without 3-phase utility service.

SYSTEM VOLTAGE: 120/240V, 1-Phase, 3-Wire + GND (60 Hz)
MAIN BUS RATING: 100A Copper Bus (UL-67 / UL-508A)
SHORE CAP MODE: PLC limits peak to 38.5A (≤ 40A continuous on 50A plug)
E-101: MWTP-50-GN22 SINGLE-LINE DIAGRAM (120/240V 1Φ INPUT → 230V 3Φ VFD MOTOR OUTPUT) SCALE: NTS • REV B GEN 20 kW GEN-801 (GOOSENECK DECK) 20 kW / 20 kVA Standby/Prime 120/240V 1Φ, 83.3A Max, 1800 RPM Gen Breaker CB-G1: 90A / 2P Feeder: 3#3 AWG + #6 GND (1.25" EMT) CS6375 50A SHORE INLET (CS6375 / NEMA 14-50) 125/250V 50A Weatherproof Twist-Lock 50-ft #6/4 SOOW Cord to Bldg Plug Inlet Breaker CB-S1: 50A / 2P + SPD Aux Contact → PLC DI_07 (40A Cap Mode) NEC ART. 250 / 551 GROUNDING & NEUTRAL ISOLATION 1. Neutral (N) and Equipment Ground (PE) are ISOLATED in Main Panel MDP-50. 2. On SHORE POWER: Neutral-to-Ground bond is at the restaurant's service panel. 3. On GENERATOR (Separately Derived System): 3-pole ATS switches L1, L2 & N; N-PE bonded at GEN-801 (generator is the active source only via the ATS). ATS-801 (100A, 3-POLE SWITCHED N) Open-Transition Auto Transfer Switch Shore Priority + Gen Auto-Start Relay MB-1: 100A / 2P MAIN BREAKER + TYPE 1 SPD (50 kA) MDP-50 MAIN BUS: 120/240V 1-PHASE, 100A COPPER BUS (UL-508A ENCLOSURE CP-701 POWER SECTION) CB-1: 30A / 2P 2#10 + #10G THWN-2 VFD-101 (5 HP 1Φ) 240V 1Φ → 230V 3Φ +3% Line Reactor P-101 3.0 HP Raw Intake (9.6A 3Φ) CB-2: 20A / 2P 2#12 + #12G THWN-2 VFD-401 (2 HP 1Φ) 240V 1Φ → 230V 3Φ +3% Line Reactor P-401 1.5 HP CT Return (5.2A 3Φ) CB-3: 30A / 2P 2#10 + #10G THWN-2 VFD-601A (5HP 1Φ) 240V 1Φ → 230V 3Φ PT-603 PID Loop P-601A 3.0 HP Booster A (9.6A 3Φ) CB-4: 30A / 2P 2#10 + #10G THWN-2 VFD-601B (5HP 1Φ) 240V 1Φ → 230V 3Φ Lag + UF Backwash P-601B 3.0 HP Booster B (9.6A 3Φ) CB-5: 20A / 2P 2#12 + #12G THWN-2 DUPLEX STARTER Lead/Lag Alternator PSL-801 @ 65 PSI CMP-801 2×1.5 HP Oil-Free Air (6.8A) CB-6: 20A / 2P 2#12 + #12G THWN-2 SHORE SHED RELAY CR-SHED (PLC DO_15) Pauses in 45s BW HVAC-901 2.4–3.1kW Heat Pump + Freeze 120V BRANCHES (L1/L2-N) • CB-7 (15A/1P): UV-401A (450W) • CB-8 (15A/1P): UV-401B (450W) • CB-9 (15A/1P): CP-701 24VDC PSU + PLC + HMI + Analyzers • CB-10 (15A/1P): Dosing Pumps P-501 / P-502A,B / P-503 • CB-11 (15A/1P): Chem Exhaust EF-901 + Interior/Scene LEDs • CB-12 (20A/1P): GFCI Wet Lab

Panel Schedule: MDP-50 (120/240V 1-Phase, 3-Wire + Ground, 100A Main Breaker)

Ckt # Breaker Equipment Tag & Description HP / Watts 240V 1Φ Input FLA Wire & Conduit Starter / VFD Type & Notes
MB-1 100A / 2P Main Panel Disconnect (Fed from ATS-801 Load Terminals) 24.0 kVA Max 34.4A Avg / 54.6A Peak 3#3 + #6 GND (1-1/4" EMT) 22 kAIC thermal-magnetic + Type 1 SPD (50 kA)
CB-1 (1,3) 30A / 2P P-101 Raw Water Intake Pump (Stage 2) 3.0 HP (2.2 kW) 16.6A (1Φ In) → 9.6A (3Φ Out) 2#10 + #10G (3/4" LFMC) VFD-101: 5 HP 240V 1Φ-in / 230V 3Φ-out (derated 50%) + 3% reactor
CB-2 (2,4) 20A / 2P P-401 Contact Tank Transfer Pump (Stage 5) 1.5 HP (1.1 kW) 9.0A (1Φ In) → 5.2A (3Φ Out) 2#12 + #12G (3/4" LFMC) VFD-401: 2 HP 240V 1Φ-in / 230V 3Φ-out + 3% line reactor
CB-3 (5,7) 30A / 2P P-601A Kitchen Booster Pump Lead (Stage 6) 3.0 HP (2.2 kW) 16.6A (1Φ In) → 9.6A (3Φ Out) 2#10 + #10G (3/4" LFMC) VFD-601A: 5 HP 240V 1Φ-in / 230V 3Φ-out; PID on PT-603
CB-4 (6,8) 30A / 2P P-601B Kitchen Booster Lag & UF Backwash Supply 3.0 HP (2.2 kW) 16.6A (1Φ In) → 9.6A (3Φ Out) 2#10 + #10G (3/4" LFMC) VFD-601B: 5 HP 240V 1Φ-in / 230V 3Φ-out; Lag booster + 40s UF BW
CB-5 (9,11) 20A / 2P CMP-801A/B Duplex Oil-Less Air Compressors 2 × 1.5 HP 6.8A (Lead) / 13.6A (Both) 2#12 + #12G (3/4" EMT) Duplex magnetic starter w/ alternator; lag starts if air < 65 PSI
CB-6 (10,12) 20A / 2P HVAC-901 Roof Heat Pump & Enclosure Freeze Heater 2.4–3.1 kW 10.0A – 12.9A @ 240V 2#12 + #12G (3/4" EMT) Wired through load-shed contactor CR-SHED (pauses during 50A Shore BW)
CB-7 (13) 15A / 1P UV-401A Amalgam UV Reactor Ballast (Duty — L1) 450 W (120V) 3.8A @ 120V (L1-N) 2#12 + #12G (1/2" EMT) Dedicated surge-filtered ballast circuit; 4–20mA UV intensity to PLC
CB-8 (14) 15A / 1P UV-401B Amalgam UV Reactor Ballast (Standby — L2) 450 W (120V) 3.8A @ 120V (L2-N) 2#12 + #12G (1/2" EMT) On opposite phase leg (L2) for redundancy; auto-start on UV-A fault
CB-9 (15) 15A / 1P CP-701 Dual 24VDC Power Supplies, PLC, HMI & Analyzers 380 W (120V) 3.2A @ 120V (L1-N) 2#12 + #12G (Internal) Redundant 24VDC 10A PSUs (diode auctioneered) + 30-min 24VDC UPS battery
CB-10 (16) 15A / 1P P-501/502A,B/503 Chemical Metering Pumps & STR-101 Motor 320 W (120V) 2.7A @ 120V (L2-N) 2#12 + #12G (1/2" EMT) 24VDC relay enable from PLC + 4–20mA speed pacing signal
CB-11 (17) 15A / 1P EF-901 Chemical Exhaust Fan (150 CFM) & Interior/Scene LEDs 260 W (120V) 2.2A @ 120V (L1-N) 2#12 + #12G (1/2" EMT) Exhaust fan runs continuously; forced high-speed on AIT-901 Cl₂ alarm
CB-12 (18) 20A / 1P GFCI Wet Lab Bench GFCI Receptacles & Exterior Service Outlet 180 W Nom 1.5A @ 120V (L2-N) 2#12 + #12G (1/2" EMT) Class A (5mA) GFCI breaker per NEC 210.8(B) for wet lab sink proximity