Whole-home surge protection for 120/240V split-phase electrical systems. The ICM518 is a UL 1449 listed Surge Protective Device you can install at the service entrance (Type 1) or as a panel-mounted protector (Type 2). A rugged NEMA 4X enclosure supports indoor or outdoor mounting, while thermally fused MOV technology and an easy 3-wire hookup make protection straightforward and reliable. A green status LED provides at-a-glance confirmation that protection is active.
:contentReference[oaicite:0]{index=0} Type 1 or Type 2 SPD: Works before or after the main disconnect to help safeguard HVAC, appliances, and home electronics from voltage spikes. :contentReference[oaicite:1]{index=1}
Built for split-phase homes: Compatible with 120/240V single-phase panels commonly used in North America. :contentReference[oaicite:2]{index=2}
NEMA 4X enclosure: Watertight and corrosion resistant for reliable indoor or outdoor installation. :contentReference[oaicite:3]{index=3}
Easy installation: Hot-hot-ground leads and a 3/4 in. threaded conduit hub support a clean, code-friendly mount. :contentReference[oaicite:4]{index=4}
LED status indicator: Green “protection when lit” light confirms the device is operational. :contentReference[oaicite:5]{index=5}
Tested performance: VPR 1200V L-L and 700V L-N; MCOV 300VAC L-L and 150VAC L-N; Nominal discharge current (In) 20kA; SCCR 200kA; Max surge current 100kA. :contentReference[oaicite:6]{index=6}
Compact footprint: Approx. 4.30 x 4.10 x 2.30 inches; about 1.10 lb for flexible placement near the panel. :contentReference[oaicite:7]{index=7}
Installation notes: Mount using the 3/4 in. hub, keep leads as short and straight as possible, and follow local code. For Type 2 installs, connect to a properly sized 2-pole breaker. Professional installation is recommended. :contentReference[oaicite:8]{index=8}
What's included: ICM518 SPD with pre-attached leads and integrated 3/4 in. hub. See the specification sheet and installation guide for wiring diagrams and additional details. :contentReference[oaicite:9]{index=9}
Ideal applications: Whole-home electrical panels, HVAC equipment, well pumps, kitchen and laundry appliances, entertainment and office electronics. :contentReference[oaicite:10]{index=10}
Keywords: whole house surge protector, Type 1 SPD, Type 2 SPD, 120/240V split-phase, NEMA 4X, UL 1449.